Is 18721 a prime number?
It is possible to find out using mathematical methods whether a given integer is a prime number or not.
No, 18 721 is not a prime number.
For example, 18 721 can be divided by 97: 18 721 / 97 = 193.
For 18 721 to be a prime number, it would have been required that 18 721 has only two divisors, i.e., itself and 1.
Find out more: