21087424792

Names of 21087424792

• Cardinal: 21087424792 can be written as Twenty-one billion, eighty-seven million, four hundred twenty-four thousand, seven hundred ninety-two.

Scientific notation

• Scientific notation: 2.1087424792 × 10¹⁰

Factors of 21087424792

• Number of distinct prime factors ω(n): 4
• Total number of prime factors Ω(n): 8
• Sum of prime factors: 831

Divisors of 21087424792

• Number of divisors d(n): 72
• Complete list of divisors:
  1 2 4 7 8 14 28 49 56 98 196 331 392 491 662 982 1324 1964 2317 2648 3437 3928 4634 6874 9268 13748 16219 18536 24059 27496 32438 48118 64876 96236 109561 129752 162521 192472 219122 325042 438244 650084 766927 876488 1137647 1300168 1533854 2275294 3067708 4550588 5368489 6135416 7963529 9101176 10736978 15927058 21473956 31854116 42947912 53794451 63708232 107588902 215177804 376561157 430355608 753122314 1506244628 2635928099 3012489256 5271856198 10543712396 21087424792
• Sum of all divisors σ(n): 46227589380
• Sum of proper divisors (its aliquot sum) s(n): 25140164588
• 21087424792 is an abundant number, because the sum of its proper divisors (25140164588) is greater than itself. Its abundance is 4052739796

Bases of 21087424792

• Binary: 10011101000111010001001000100011000₂
• Hexadecimal: 0x4E8E89118
• Base-36: 9OQWP3S

Squares and roots of 21087424792

• 21087424792 squared (21087424792²) is 444679484358256243264
• 21087424792 cubed (21087424792³) is 9377145182950068914094056601088
• The square root of 21087424792 is 145215.0983610175
• The cube root of 21087424792 is 2762.7474213723

Scales and comparisons

• 21,087,424,792 seconds is equal to 670 years, 26 weeks, 5 days, 9 hours, 59 minutes, 52 seconds.
• To count from 1 to 21,087,424,792 would take you about one thousand, three hundred forty-one 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 21087424792 cubic inches would be around 230.2 feet tall.

Recreational maths with 21087424792

• 21087424792 backwards is 29742478012
• The number of decimal digits it has is: 11
• The sum of 21087424792's digits is 46
• More coming soon!