Q: Is 20,507 a Prime Number?
A: Yes, 20,507 is a prime number.
A prime number is a natural number, greater than one, that can only be divided by 1 and itself.
The number 20507 can be evenly divided by 1 and 20,507, with no remainder.
Since 20,507 can be divided by just 1 and 20,507, it is a prime number.