Q: Is 21,304 a Prime Number?
A: No, 21,304 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 21304 can be evenly divided by 1 2 4 8 2,663 5,326 10,652 and 21,304, with no remainder.
Since 21,304 cannot be divided by just 1 and 21,304, it is not a prime number.