Q: Is 21,073 a Prime Number?
A: No, 21,073 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 21073 can be evenly divided by 1 13 1,621 and 21,073, with no remainder.
Since 21,073 cannot be divided by just 1 and 21,073, it is not a prime number.