Q: Is 20,439 a Prime Number?
A: No, 20,439 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 20439 can be evenly divided by 1 3 9 27 757 2,271 6,813 and 20,439, with no remainder.
Since 20,439 cannot be divided by just 1 and 20,439, it is not a prime number.