Q: Is 18,400 a Prime Number?
A: No, 18,400 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 18400 can be evenly divided by 1 2 4 5 8 10 16 20 23 25 32 40 46 50 80 92 100 115 160 184 200 230 368 400 460 575 736 800 920 1,150 1,840 2,300 3,680 4,600 9,200 and 18,400, with no remainder.
Since 18,400 cannot be divided by just 1 and 18,400, it is not a prime number.