21915830824821

Names of 21915830824821

• Cardinal: 21915830824821 can be written as Twenty-one trillion, nine hundred fifteen billion, eight hundred thirty million, eight hundred twenty-four thousand, eight hundred twenty-one.

Scientific notation

• Scientific notation: 2.1915830824821 × 10¹³

Factors of 21915830824821

• Number of distinct prime factors ω(n): 4
• Total number of prime factors Ω(n): 7
• Sum of prime factors: 2518

Divisors of 21915830824821

• Number of divisors d(n): 54
• Complete list of divisors:
  1 3 9 61 183 549 593 1779 1861 3721 5337 5583 11163 16749 33489 36173 108519 113521 325557 340563 351649 1021689 1054947 1103573 2206553 3164841 3310719 6619659 6924781 9932157 19858977 20774343 21450589 62323029 64351767 67317953 193055301 201953859 605861577 654418789 1308485929 1963256367 3925457787 4106395133 5889769101 11776373361 12319185399 36957556197 39919546129 119758638387 359275915161 2435092313869 7305276941607 21915830824821
• Sum of all divisors σ(n): 32255348721414
• Sum of proper divisors (its aliquot sum) s(n): 10339517896593
• 21915830824821 is a deficient number, because the sum of its proper divisors (10339517896593) is less than itself. Its deficiency is 11576312928228

Bases of 21915830824821

• Binary: 100111110111010101101010011111010111101110101₂
• Hexadecimal: 0x13EEAD4FAF75
• Base-36: 7RNZRTMR9

Squares and roots of 21915830824821

• 21915830824821 squared (21915830824821²) is 480303640742174313189682041
• 21915830824821 cubed (21915830824821³) is 10526253335051095338832788544035760739661
• The square root of 21915830824821 is 4681434.6972718737
• The cube root of 21915830824821 is 27984.6134957161

Scales and comparisons

• 21,915,830,824,821 seconds is equal to 696,855 years, 32 weeks, 5 days, 8 hours, 40 minutes, 21 seconds.
• To count from 1 to 21,915,830,824,821 would take you about one million, seven hundred forty-two thousand, one hundred thirty-nine years!

  This is a very rough estimate, based on a speaking rate of half a second every third order of magnitude. If you speak quickly, you could probably say any randomly-chosen number between one and a thousand in around half a second. Very big numbers obviously take longer to say, so we add half a second for every extra x1000. (We do not count involuntary pauses, bathroom breaks or the necessity of sleep in our calculation!)

• A cube with a volume of 21915830824821 cubic inches would be around 2332.1 feet tall.

Recreational maths with 21915830824821

• 21915830824821 backwards is 12842803851912
• The number of decimal digits it has is: 14
• The sum of 21915830824821's digits is 54
• More coming soon!