21229681872

Names of 21229681872

• Cardinal: 21229681872 can be written as Twenty-one billion, two hundred twenty-nine million, six hundred eighty-one thousand, eight hundred seventy-two.

Scientific notation

• Scientific notation: 2.1229681872 × 10¹⁰

Factors of 21229681872

• Number of distinct prime factors ω(n): 5
• Total number of prime factors Ω(n): 8
• Sum of prime factors: 3716710

Divisors of 21229681872

• Number of divisors d(n): 80
• Complete list of divisors:
  1 2 3 4 6 7 8 12 14 16 17 21 24 28 34 42 48 51 56 68 84 102 112 119 136 168 204 238 272 336 357 408 476 714 816 952 1428 1904 2856 5712 3716681 7433362 11150043 14866724 22300086 26016767 29733448 44600172 52033534 59466896 63183577 78050301 89200344 104067068 126367154 156100602 178400688 189550731 208134136 252734308 312201204 379101462 416268272 442285039 505468616 624402408 758202924 884570078 1010937232 1248804816 1326855117 1516405848 1769140156 2653710234 3032811696 3538280312 5307420468 7076560624 10614840936 21229681872
• Sum of all divisors σ(n): 66365073792
• Sum of proper divisors (its aliquot sum) s(n): 45135391920
• 21229681872 is an abundant number, because the sum of its proper divisors (45135391920) is greater than itself. Its abundance is 23905710048

Bases of 21229681872

• Binary: 10011110001011000110011110011010000₂
• Hexadecimal: 0x4F1633CD0
• Base-36: 9R3LRDC

Squares and roots of 21229681872

• 21229681872 squared (21229681872²) is 450699392386325424384
• 21229681872 cubed (21229681872³) is 9568204720265387682737711566848
• The square root of 21229681872 is 145704.0901004499
• The cube root of 21229681872 is 2768.9460587473

Scales and comparisons

• 21,229,681,872 seconds is equal to 675 years, 1 week, 6 days, 21 hours, 51 minutes, 12 seconds.
• To count from 1 to 21,229,681,872 would take you about one thousand, three hundred fifty 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 21229681872 cubic inches would be around 230.7 feet tall.

Recreational maths with 21229681872

• 21229681872 backwards is 27818692212
• 21229681872 is a Harshad number.
• The number of decimal digits it has is: 11
• The sum of 21229681872's digits is 48
• More coming soon!