20987401890

Names of 20987401890

• Cardinal: 20987401890 can be written as Twenty billion, nine hundred eighty-seven million, four hundred one thousand, eight hundred ninety.

Scientific notation

• Scientific notation: 2.098740189 × 10¹⁰

Factors of 20987401890

• Number of distinct prime factors ω(n): 6
• Total number of prime factors Ω(n): 8
• Sum of prime factors: 799

Divisors of 20987401890

• Number of divisors d(n): 144
• Complete list of divisors:
  1 2 3 5 6 7 10 13 14 15 21 26 30 35 39 42 65 70 78 91 105 130 169 182 195 210 273 338 390 455 507 546 769 845 910 1014 1183 1365 1538 1690 2307 2366 2535 2730 3549 3845 4614 5070 5383 5915 7098 7690 9997 10766 11535 11830 16149 17745 19994 23070 26915 29991 32298 35490 49985 53830 59982 69979 80745 99970 129961 139958 149955 161490 209937 259922 299910 349895 389883 419874 591361 649805 699790 779766 909727 1049685 1182722 1299610 1774083 1819454 1949415 2099370 2729181 2956805 3548166 3898830 4139527 4548635 5458362 5913610 7687693 8279054 8870415 9097270 12418581 13645905 15375386 17740830 20697635 23063079 24837162 27291810 38438465 41395270 46126158 53813851 62092905 76876930 99940009 107627702 115315395 124185810 161441553 199880018 230630790 269069255 299820027 322883106 499700045 538138510 599640054 699580063 807207765 999400090 1399160126 1499100135 1614415530 2098740189 2998200270 3497900315 4197480378 6995800630 10493700945 20987401890
• Sum of all divisors σ(n): 62415344448
• Sum of proper divisors (its aliquot sum) s(n): 41427942558
• 20987401890 is an abundant number, because the sum of its proper divisors (41427942558) is greater than itself. Its abundance is 20440540668

Bases of 20987401890

• Binary: 10011100010111100100101011010100010₂
• Hexadecimal: 0x4E2F256A2
• Base-36: 9N3CUXU

Squares and roots of 20987401890

• 20987401890 squared (20987401890²) is 440471038092375572100
• 20987401890 cubed (20987401890³) is 9244342697350185076481371269000
• The square root of 20987401890 is 144870.2933316559
• The cube root of 20987401890 is 2758.3723639529

Scales and comparisons

• 20,987,401,890 seconds is equal to 667 years, 17 weeks, 2 days, 17 hours, 51 minutes, 30 seconds.
• To count from 1 to 20,987,401,890 would take you about one thousand, three hundred thirty-four 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 20987401890 cubic inches would be around 229.9 feet tall.

Recreational maths with 20987401890

• 20987401890 backwards is 09810478902
• The number of decimal digits it has is: 11
• The sum of 20987401890's digits is 48
• More coming soon!