Q: Is 18,000 a Prime Number?
A: No, 18,000 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 18000 can be evenly divided by 1 2 3 4 5 6 8 9 10 12 15 16 18 20 24 25 30 36 40 45 48 50 60 72 75 80 90 100 120 125 144 150 180 200 225 240 250 300 360 375 400 450 500 600 720 750 900 1,000 1,125 1,200 1,500 1,800 2,000 2,250 3,000 3,600 4,500 6,000 9,000 and 18,000, with no remainder.
Since 18,000 cannot be divided by just 1 and 18,000, it is not a prime number.