Q: Is 20,891 a Prime Number?
A: No, 20,891 is not a prime number.
A prime number is a natural number, greater than one, that can only be divided by 1 and itself.
The number 20891 can be evenly divided by 1 13 1,607 and 20,891, with no remainder.
Since 20,891 cannot be divided by just 1 and 20,891, it is not a prime number.