Q: Is 20,872 a Prime Number?
A: No, 20,872 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 20872 can be evenly divided by 1 2 4 8 2,609 5,218 10,436 and 20,872, with no remainder.
Since 20,872 cannot be divided by just 1 and 20,872, it is not a prime number.