Q: Is 20,500 a Prime Number?
A: No, 20,500 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 20500 can be evenly divided by 1 2 4 5 10 20 25 41 50 82 100 125 164 205 250 410 500 820 1,025 2,050 4,100 5,125 10,250 and 20,500, with no remainder.
Since 20,500 cannot be divided by just 1 and 20,500, it is not a prime number.