Prime Numbers 1 to 20
There are 8 prime numbers, 7 odd Prime Numbers 1 to 20
How to Find Prime numbers 1 to 20?
Step-1 Remove all numbers divisible by 2 from the table list.
First, make a table of all numbers from 1 to 20. Remove the numbers that are divisible by 2 from the table list.
Step-2 In the second step, remove the numbers that are divisible from 3 from the list.
Step-3 The number left after dividing by 3 will be prime numbers.
Sum of prime number between 1 to 20
There are 8 numbers from 1 to 20 and their sum is 77. Sum 2+3+5+7+11+13+17+19 = 77
Sum of all odd prime numbers between 1 to 20
There are 7 numbers from 1 to 20 and their sum is 75. Sum 3+5+7+11+13+17+19 = 75
A co-prime number between 1 to 20
| 1,2 | 2,3 | 3,5 | 13,17 | 1,3 |
| 2,5 | 13,19 | 3,7 | 1,4 | 2,7 |
| 3,11 | 1,5 | 2,9 | 3,13 | 1,6 |
| 2,11 | 3,17 | 1,7 | 2,13 | 3,19 |
| 1,8 | 2,15 | 1,9 | 2,17 | 1,10 |
| 2,19 | 1,11 | 2,21 | 2,23 | 1,12 |
How many prime numbers are there between 0 and 20?
There are 8 prime numbers and 7 odd prime numbers from 1 to 20.
Is 1 a prime number?
1 is not a prime number but a natural number.
Why 1 is not a prime number?
Prime numbers by definition have only two factors. There is only one factor of 1 so it is not a prime number but a natural number.
What is the greatest prime number between 1 to 20?
The greatest prime number between 1 to 20 is 19 which is also an odd prime number.
What are the smallest prime numbers between 1 and 20?
The smallest prime number between 1 and 20 is 2 not 1. 2 is the only-one even prime number
Which is the even prime number 1 to 20?
There are 2 even prime numbers between 1 to 20 numbers.
Is 2 a prime number?
Yes! 2 is even prime number.
Is 3 a prime number?
Yes! 3 is odd prime.
Is 4 a prime number?
No! natural number
Is 5 a prime number?
Yes! 5 is odd prime number
Is 6 a prime number?
No! 6 is natural number
Is 7 a prime number?
Yes! 7 is odd prime number
Is 8 a prime number?
No! 8 is natural and even number
Is 9 a prime number?
No! 9 natural number and odd number
Is 10 a prime number?
No! 10 natural and even number
It really helped me!! Thanks for making this website
It really helped me!! Thanks for making this website