18 factorial is equal to 6402373705728000 - with three consecutive zeroes at the end.
There are 18 zeros.
18 factorial is 6,402,373,705,728,000.
There are 18 zeros in a quin trillion
18.
18
18
There isn't a quiltrillion but there is a quintrillion which has 18 zeros. A quadtrillion has 15 zeros.
grand = 1000 18,000 = 3 zeros
18! = 6,402,373,705,728,000
18
18 of them.
18,000,000 = six zeroes