16! (the factorial of 16) is 20,922,789,888,000.
16! (the factorial of 16) is 20,922,789,888,000.
The factorial of a whole number n is the product of every whole number from n down to 1.
16! = 16 × 15 × 14 × 13 × 12 × 11 × 10 × 9 × 8 × 7 × 6 × 5 × 4 × 3 × 2 × 1 = 20,922,789,888,000
16! has 14 digits. Factorials grow very quickly: each step multiplies by a bigger number than the last, so 16! is 16 times larger than 15! (1,307,674,368,000).
Many calculators show the result in scientific notation for large factorials.
| 16! | = 20,922,789,888,000 |
| 15! | = 1,307,674,368,000 |
| 16! ÷ 15! | = 16 |
| n | n! | Digits |
|---|---|---|
| 1! | 1 | 1 digits |
| 2! | 2 | 1 digits |
| 3! | 6 | 1 digits |
| 4! | 24 | 2 digits |
| 5! | 120 | 3 digits |
| 6! | 720 | 3 digits |
| 7! | 5,040 | 4 digits |
| 8! | 40,320 | 5 digits |
| 9! | 362,880 | 6 digits |
| 10! | 3,628,800 | 7 digits |
| 11! | 39,916,800 | 8 digits |
| 12! | 479,001,600 | 9 digits |
| 13! | 6,227,020,800 | 10 digits |
| 14! | 87,178,291,200 | 11 digits |
| 15! | 1,307,674,368,000 | 13 digits |
| 16! | 20,922,789,888,000 | 14 digits |
| 17! | 355,687,428,096,000 | 15 digits |
| 18! | 6,402,373,705,728,000 | 16 digits |
| 19! | 121,645,100,408,832,000 | 18 digits |
| 20! | 2,432,902,008,176,640,000 | 19 digits |
16! (the factorial of 16) is 20,922,789,888,000.
Multiply all whole numbers from 16 down to 1: 16 × 15 × 14 × 13 × 12 × 11 × 10 × 9 × 8 × 7 × 6 × 5 × 4 × 3 × 2 × 1 = 20,922,789,888,000.
16! has 14 digits.
0! is defined as 1, which keeps formulas for permutations and combinations consistent.
Yes. Use the calculator on this page, or open the full free Scientific Calculator with memory, history and keyboard support.