What is 13 factorial ?

To find 13 factorial, or 13!, simply use the formula that multiplies the number 13 by all positive whole numbers less than it.

Let's look at how to calculate the Factorial of Thirteen :

  13! is exactly : 6227020800

  Factorial of 13 can be calculated as:
13! = 13 x 12 x 11 x 10 x ... x 3 x 2 x 1

  The number of trailing zeros in 13! is 2

  The number of digits in 13 factorial is 10.

• 9 Factorial
• 10 Factorial
• 11 Factorial
• 12 Factorial
• Factorial of 14
• Factorial of 15
• Factorial of 16
• Factorial of 17

A factorial is represented by an integer and an exclamation mark. In arithmetic, factorial is a multiplication process of natural numbers .

It multiplies the number by every organic number that is less than it .

Symbolically, it is represented as "!".

The function is used, among other things, to get the "n" way items can be determined .

To find the factorial of any given number, replace the value for n in the given solution :

n! = n × (n-1) × (n-2) × (n-3) × ….× 3 × 2 × 1

The expansion of the formula provides the numbers to be multiplied to each other to have the factorial of the number.

We can also work out a factorial from the previous one. The factorial of any number is that number replicated the factorial of (that number minus 1).

So the rule is : n! = n × (n−1)!

Example :
13! Factorial = 13 x 12 x 11 x 10 x ... x 3 x 2 x 1 = 13 × 12! = 6227020800

The best use of factorial is in Combinations and Permutations.

Example : Determine how to arrange letters without repeating?

There one way for 1 letter "a":
2 ways for two letters "ab": ab, ba.
There are 6 ways for 3 letters "abc": abc acb cab bac bca.
There are 24 ways for 1234 of the letters "abcd"

13 in French

13 in English

Factors of 13