Q: Is 20,978 a Prime Number?
A: No, 20,978 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 20978 can be evenly divided by 1 2 17 34 617 1,234 10,489 and 20,978, with no remainder.
Since 20,978 cannot be divided by just 1 and 20,978, it is not a prime number.