What is the factorial of 21? (21!) 21 Factorial

What is the factorial of 21?

Here we will show you how to calculate the factorial of 21 (aka 21 factorial) and give you the exact answer.

Before we begin, note that the factorial of 21 can be written as 21 followed by an exclamation mark like this: 21!

Factorial of 21 means that you multiply 21 by every number below it. Therefore, you calculate the factorial of 21 by multiplying 21 by 20 and then by 19 and so on all the way down to 1. In other words, we calculate 21 × 20 × 19 × ... × 1 to get 21 factorial.

The answer to 21 factorial (21!) contains 20 digits, and below is the exact entire answer to 21!

51,090,942,171,709,440,000

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What is the factorial of 22?
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