Q: Is 20,689 a Prime Number?
A: No, 20,689 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 20689 can be evenly divided by 1 17 1,217 and 20,689, with no remainder.
Since 20,689 cannot be divided by just 1 and 20,689, it is not a prime number.