21107518390

Names of 21107518390

• Cardinal: 21107518390 can be written as Twenty-one billion, one hundred seven million, five hundred eighteen thousand, three hundred ninety.

Scientific notation

• Scientific notation: 2.110751839 × 10¹⁰

Factors of 21107518390

• Number of distinct prime factors ω(n): 7
• Total number of prime factors Ω(n): 7
• Sum of prime factors: 1974

Divisors of 21107518390

• Number of divisors d(n): 128
• Complete list of divisors:
  1 2 5 7 10 14 31 35 37 62 70 74 151 155 185 217 259 302 310 370 434 518 755 1057 1085 1147 1295 1510 1741 2114 2170 2294 2590 3482 4681 5285 5587 5735 8029 8705 9362 10570 11174 11470 12187 16058 17410 23405 24374 27935 32767 39109 40145 46810 53971 55870 60935 64417 65534 78218 80290 107942 121870 128834 163835 173197 195545 262891 269855 322085 327670 346394 377797 391090 450919 525782 539710 644170 755594 865985 901838 1212379 1314455 1731970 1840237 1888985 1996927 2254595 2424758 2628910 3680474 3777970 3993854 4509190 6061895 8149621 9201185 9726967 9984635 12123790 13978489 16299242 18402370 19453934 19969270 27956978 40748105 48634835 57047347 68088769 69892445 81496210 97269670 114094694 136177538 139784890 285236735 301535977 340443845 570473470 603071954 680887690 1507679885 2110751839 3015359770 4221503678 10553759195 21107518390
• Sum of all divisors σ(n): 46364737536
• Sum of proper divisors (its aliquot sum) s(n): 25257219146
• 21107518390 is an abundant number, because the sum of its proper divisors (25257219146) is greater than itself. Its abundance is 4149700756

Bases of 21107518390

• Binary: 10011101010000110110010101110110110₂
• Hexadecimal: 0x4EA1B2BB6
• Base-36: 9P2VDFA

Squares and roots of 21107518390

• 21107518390 squared (21107518390²) is 445527332584188192100
• 21107518390 cubed (21107518390³) is 9403976365768398487971602719000
• The square root of 21107518390 is 145284.2675240509
• The cube root of 21107518390 is 2763.6246568735

Scales and comparisons

• 21,107,518,390 seconds is equal to 671 years, 7 weeks, 6 days, 23 hours, 33 minutes, 10 seconds.
• To count from 1 to 21,107,518,390 would take you about one thousand, three hundred forty-two 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 21107518390 cubic inches would be around 230.3 feet tall.

Recreational maths with 21107518390

• 21107518390 backwards is 09381570112
• 21107518390 is a Harshad number.
• The number of decimal digits it has is: 11
• The sum of 21107518390's digits is 37
• More coming soon!