Prime Numbers 1 to 20
Prime numbers from 1 to 20 are the natural numbers greater than 1 which are divisible only by 1 and itself. There is a total of 8 prime numbers from 1 to 20. Let us learn how to find the prime numbers between 1 to 20.
1.  How to Find Prime Numbers 1 to 20? 
2.  List of Prime Numbers From 1 to 20 
3.  Important Points on Prime Numbers 1 to 20 
4.  Solved Examples 
5.  FAQs on Prime Numbers From 1 to 20 
How to Find Prime Numbers From 1 to 20?
Prime numbers from 1 to 20 are the numbers that have exactly two factors and are not divisible further into a product of two natural numbers other than 1 and itself. To find whether 'x' is a prime number from 1 to 20, we need to check the belowmentioned conditions (all three at the same time):
 Prime Numbers 1 to 20 Condition 1: Number should be divisible by 1 (x ÷ 1 = x)
 Prime Numbers 1 to 20 Condition 2: Number should be divisible by itself. (x ÷ x =1)
 Prime Numbers 1 to 20 Condition 3: Number must have only 2 factors 1 and the same number.
Let us apply the above conditions on 2 different numbers 6 and 7 and check whether they are prime numbers or not.
Number 6 is completely divisible by 1, it is divisible by itself, and the factors of 6 are 1, 2,3, and 6. Hence, number 6 is not following all three conditions at the same time. It is not a prime number, whereas, 7 is completely divisible by 1 and 7 and the factors of 7 are 1 and 7. Therefore, it is a prime number.
Let us apply the above rules and find the prime numbers from 1 to 20.
Prime Numbers From 1 to 10
Amongst the list of 10 numbers between 1 to 10, the numbers that have only 1 and the number itself as a factor are 2, 3, 5, and 7.
Prime Numbers From 11 to 20
Amongst the list of 10 numbers between 11 to 20, the numbers that have only 1 and the number itself as a factor are 11, 13, 17, and 19.
List of Prime Numbers From 1 to 20
Let us look at the list of prime numbers from 1 to 20.
Range  Prime numbers 
List of Prime numbers from 1 to 10  2, 3, 5, 7 
List of Prime numbers from 11 to 20  11, 13, 17, 19 
Hence, there are a total of 8 prime numbers from 1 to 20.
Important Points on Prime Numbers 1 to 20
Some of the important points on prime numbers 1 to 20 are given below:
 prime numbers 1 to 20 are whole numbers greater than 1.
 prime numbers 1 to 20 are the numbers with exactly two factors, i.e., 1 and the number itself.
 Amongst the 8 prime numbers between 1 to 20, there is one even prime number, that is, 2.
Related Articles on Prime Numbers 1 to 20
Check out the following pages related to prime numbers 1 to 20
Solved Examples

Example 1. Find the sum of the prime numbers from 1 to 20.
Solution:
According to the list of prime numbers 1 to 20, the prime numbers from 1 to 20 are 2, 3, 5, 7, 11, 13, 17, and 19.
The sum of 2, 3, 5, 7, 11, 13, 17, and 19 are,
2 + 3 + 5 + 7 + 11 + 13 + 17 + 19 = 77.
The sum of the prime numbers from 1 to 20 is 77. 
Example 2. Find the product of the first four prime numbers from 1 to 20.
Solution:
According to the list of prime numbers 1 to 20, the first four prime numbers from 1 to 20 are 2, 3, 5, and 7.
The product of 2, 3, 5, and 7 are,
2 × 3 × 5 × 7 = 210.
The product of the first four prime numbers from 1 to 20 is 210.
FAQs on Prime Numbers From 1 to 20
How Many Prime Numbers Are There Between 1 and 20?
There are 8 prime numbers from 1 to 20. They are listed below:
2, 3, 5, 7, 11, 13, 17, and 19.
What Are the Even Prime Numbers From 1 to 20?
The prime numbers from 1 to 20 are 2, 3, 5, 7, 11, 13, 17, and 19. The even number that is a prime number between 1 and 20 is 2. Number 2 is also referred to as an even prime number.
What Is the Sum of Odd Prime Numbers Between 1 to 20?
The list of odd numbers that are prime numbers from 1 to 20 are 3, 5, 7, 11, 13, 17, 19. Let us now add them as 3 + 5 + 7 + 11 + 13 + 17 + 19 = 75. So, the sum of all the odd prime numbers from 1 to 20 is 75.
What Is the Product of Last Four Odd Prime Numbers Between 1 to 20?
According to the list of prime numbers 1 to 20, the last four odd prime numbers from 1 to 20 are 11, 13, 17, and 19.
The product of 11, 13, 17, and 19 are,
11 × 13 × 17 × 19 = 46189.
The product of the last four prime numbers from 1 to 20 is 46189.
Which is the Largest Prime Number Between 1 to 20?
There are 8 prime numbers from 1 to 20 listed below:
2, 3, 5, 7, 11, 13, 17, and 19. The largest prime number between 1 to 20 is 19.