21918009020

Names of 21918009020

• Cardinal: 21918009020 can be written as Twenty-one billion, nine hundred eighteen million, nine thousand and twenty.

Scientific notation

• Scientific notation: 2.191800902 × 10¹⁰

Factors of 21918009020

• Number of distinct prime factors ω(n): 5
• Total number of prime factors Ω(n): 8
• Sum of prime factors: 314

Divisors of 21918009020

• Number of divisors d(n): 108
• Complete list of divisors:
  1 2 4 5 10 20 43 53 86 106 172 211 212 215 265 422 430 530 844 860 1055 1060 1849 2110 2279 2809 3698 4220 4558 5618 7396 9073 9116 9245 11183 11236 11395 14045 18146 18490 22366 22790 28090 36292 36980 44732 45365 45580 55915 56180 90730 97997 111830 120787 181460 195994 223660 241574 390139 391988 480869 483148 489985 592699 603935 780278 961738 979970 1185398 1207870 1560556 1923476 1950695 1959940 2370796 2404345 2415740 2963495 3901390 4808690 5193841 5926990 7802780 9617380 10387682 11853980 20677367 20775364 25486057 25969205 41354734 50972114 51938410 82709468 101944228 103386835 103876820 127430285 206773670 254860570 413547340 509721140 1095900451 2191800902 4383601804 5479502255 10959004510 21918009020
• Sum of all divisors σ(n): 48256643736
• Sum of proper divisors (its aliquot sum) s(n): 26338634716
• 21918009020 is an abundant number, because the sum of its proper divisors (26338634716) is greater than itself. Its abundance is 4420625696

Bases of 21918009020

• Binary: 10100011010011010100100011010111100₂
• Hexadecimal: 0x51A6A46BC
• Base-36: A2HEZZW

Squares and roots of 21918009020

• 21918009020 squared (21918009020²) is 480399119400801360400
• 21918009020 cubed (21918009020³) is 10529392232226821212475470808000
• The square root of 21918009020 is 148047.3202053991
• The cube root of 21918009020 is 2798.5540587055

Scales and comparisons

• 21,918,009,020 seconds is equal to 696 years, 48 weeks, 15 hours, 50 minutes, 20 seconds.
• To count from 1 to 21,918,009,020 would take you about one thousand, three hundred ninety-three 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 21918009020 cubic inches would be around 233.2 feet tall.

Recreational maths with 21918009020

• 21918009020 backwards is 02090081912
• The number of decimal digits it has is: 11
• The sum of 21918009020's digits is 32
• More coming soon!