Answer for "What are Prime numbers between 18 and 21?"
There are 1 prime numbers from 18 to 21:
About "Prime Numbers List" Calculator
This calculator will show a list of primes between the given numbers. For example, What are Prime numbers between 18 and 21? Select the initial number (e.g. '18') and the finite number (e.g. '21'). After that click the 'Calculate' button.
Prime numbers are the positive integers having only two factors - 1 and the number itself