21407538870

Names of 21407538870

• Cardinal: 21407538870 can be written as Twenty-one billion, four hundred seven million, five hundred thirty-eight thousand, eight hundred seventy.

Scientific notation

• Scientific notation: 2.140753887 × 10¹⁰

Factors of 21407538870

• Number of distinct prime factors ω(n): 6
• Total number of prime factors Ω(n): 8
• Sum of prime factors: 13221

Divisors of 21407538870

• Number of divisors d(n): 128
• Complete list of divisors:
  1 2 3 5 6 9 10 15 18 27 30 31 45 54 62 90 93 135 155 186 197 270 279 310 394 465 558 591 837 930 985 1182 1395 1674 1773 1970 2790 2955 3546 4185 5319 5910 6107 8370 8865 10638 12214 12983 17730 18321 25966 26595 30535 36642 38949 53190 54963 61070 64915 77898 91605 109926 116847 129830 164889 183210 194745 233694 274815 329778 350541 389490 402473 549630 584235 701082 804946 824445 1168470 1207419 1648890 1752705 2012365 2414838 2557651 3505410 3622257 4024730 5115302 6037095 7244514 7672953 10866771 12074190 12788255 15345906 18111285 21733542 23018859 25576510 36222570 38364765 46037718 54333855 69056577 76729530 79287181 108667710 115094295 138113154 158574362 230188590 237861543 345282885 396435905 475723086 690565770 713584629 792871810 1189307715 1427169258 2140753887 2378615430 3567923145 4281507774 7135846290 10703769435 21407538870
• Sum of all divisors σ(n): 59231969280
• Sum of proper divisors (its aliquot sum) s(n): 37824430410
• 21407538870 is an abundant number, because the sum of its proper divisors (37824430410) is greater than itself. Its abundance is 16416891540

Bases of 21407538870

• Binary: 10011111011111111010001111010110110₂
• Hexadecimal: 0x4FBFD1EB6
• Base-36: 9U1HUPI

Squares and roots of 21407538870

• 21407538870 squared (21407538870²) is 458282720470560876900
• 21407538870 cubed (21407538870³) is 9810705151922876662938035103000
• The square root of 21407538870 is 146313.1534415139
• The cube root of 21407538870 is 2776.6570789489

Scales and comparisons

• 21,407,538,870 seconds is equal to 680 years, 36 weeks, 10 hours, 34 minutes, 30 seconds.
• To count from 1 to 21,407,538,870 would take you about one thousand, three hundred sixty-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 21407538870 cubic inches would be around 231.4 feet tall.

Recreational maths with 21407538870

• 21407538870 backwards is 07883570412
• 21407538870 is a Harshad number.
• The number of decimal digits it has is: 11
• The sum of 21407538870's digits is 45
• More coming soon!