21378468735

Names of 21378468735

• Cardinal: 21378468735 can be written as Twenty-one billion, three hundred seventy-eight million, four hundred sixty-eight thousand, seven hundred thirty-five.

Scientific notation

• Scientific notation: 2.1378468735 × 10¹⁰

Factors of 21378468735

• Number of distinct prime factors ω(n): 5
• Total number of prime factors Ω(n): 9
• Sum of prime factors: 639

Divisors of 21378468735

• Number of divisors d(n): 144
• Complete list of divisors:
  1 3 5 9 13 15 19 39 45 57 65 95 117 169 171 195 247 285 361 507 585 599 741 845 855 1083 1235 1521 1797 1805 2197 2223 2535 2995 3211 3249 3705 4693 5391 5415 6591 7605 7787 8985 9633 10985 11115 11381 14079 16055 16245 19773 23361 23465 26955 28899 32955 34143 38935 41743 42237 48165 56905 61009 70083 70395 98865 101231 102429 116805 125229 144495 147953 170715 183027 208715 211185 216239 303693 305045 350415 375687 443859 506155 512145 549081 626145 648717 739765 793117 911079 915135 1081195 1316003 1331577 1518465 1878435 1923389 1946151 2219295 2379351 2745405 2811107 3243585 3948009 3965585 4555395 5770167 6580015 6657885 7138053 8433321 9616945 9730755 11844027 11896755 14055535 17310501 19740045 25004057 25299963 28850835 35690265 36544391 42166605 59220135 75012171 86552505 109633173 125020285 126499815 182721955 225036513 328899519 375060855 475077083 548165865 1125182565 1425231249 1644497595 2375385415 4275693747 7126156245 21378468735
• Sum of all divisors σ(n): 42437304000
• Sum of proper divisors (its aliquot sum) s(n): 21058835265
• 21378468735 is a deficient number, because the sum of its proper divisors (21058835265) is less than itself. Its deficiency is 319633470

Bases of 21378468735

• Binary: 10011111010010000011000101101111111₂
• Hexadecimal: 0x4FA418B7F
• Base-36: 9TK6S1R

Squares and roots of 21378468735

• 21378468735 squared (21378468735²) is 457038925453372500225
• 21378468735 cubed (21378468735³) is 9770792378482919696368942965375
• The square root of 21378468735 is 146213.7775142959
• The cube root of 21378468735 is 2775.3996658351

Scales and comparisons

• 21,378,468,735 seconds is equal to 679 years, 39 weeks, 6 days, 23 hours, 32 minutes, 15 seconds.
• To count from 1 to 21,378,468,735 would take you about one thousand, three hundred fifty-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 21378468735 cubic inches would be around 231.3 feet tall.

Recreational maths with 21378468735

• 21378468735 backwards is 53786487312
• The number of decimal digits it has is: 11
• The sum of 21378468735's digits is 54
• More coming soon!