Q: Is 21,679 a Prime Number?
A: No, 21,679 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 21679 can be evenly divided by 1 7 19 133 163 1,141 3,097 and 21,679, with no remainder.
Since 21,679 cannot be divided by just 1 and 21,679, it is not a prime number.