Factorial/Examples/20

Example of Factorial

 * $20! = 2 \, 432 \, 902 \, 008 \, 176 \, 640 \, 000$

Proof
From $19$ Factorial:
 * $19! = 121 \, 645 \, 100 \, 408 \, 832 \, 000$

Then: 121 645 100 408 832 000 x                     20

2 432 902 008 176 640 000