What is 20! (20 factorial)?
2,432,902,008,176,640,000 — 20 factorial (20!) equals 2,432,902,008,176,640,000. A factorial is the product of all positive integers from 1 up to the given number. Factorials are used in probability, combinations, permutations, and many areas of mathematics.
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Below is the step-by-step calculation used to determine the result.
Answer
2,432,902,008,176,640,000
20! = 20 × 19 × 18 × 17 × 16 × 15 × 14 × 13 × 12 × 11 × 10 × 9 × 8 × 7 × 6 × 5 × 4 × 3 × 2 × 1 = 2,432,902,008,176,640,000
Calculate
20 × 19 × 18 × 17 × 16 × 15 × 14 × 13 × 12 × 11 × 10 × 9 × 8 × 7 × 6 × 5 × 4 × 3 × 2 × 1 = 2,432,902,008,176,640,000
Step-by-Step Solution
20! means multiply all integers from 20 down to 1
Calculate: 20 × 19 × 18 × 17 × 16 × 15 × 14 × 13 × 12 × 11 × 10 × 9 × 8 × 7 × 6 × 5 × 4 × 3 × 2 × 1 = 2,432,902,008,176,640,000
Therefore, 20! = 2,432,902,008,176,640,000
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