21081420477

Names of 21081420477

• Cardinal: 21081420477 can be written as Twenty-one billion, eighty-one million, four hundred twenty thousand, four hundred seventy-seven.

Scientific notation

• Scientific notation: 2.1081420477 × 10¹⁰

Factors of 21081420477

• Number of distinct prime factors ω(n): 6
• Total number of prime factors Ω(n): 9
• Sum of prime factors: 226

Divisors of 21081420477

• Number of divisors d(n): 192
• Complete list of divisors:
  1 3 9 13 23 27 37 39 61 69 89 111 117 169 183 207 267 299 333 351 481 507 549 621 793 801 851 897 999 1157 1403 1443 1521 1647 2047 2257 2379 2403 2553 2691 3293 3471 3887 4209 4329 4563 5429 6141 6253 6771 7137 7659 8073 9879 10309 10413 11063 11661 12627 12987 15041 16287 18239 18423 18759 20313 21411 22977 26611 29341 29637 30927 31239 33189 34983 37881 42809 45123 48861 51911 54717 55269 56277 60939 70577 75739 79833 88023 88911 92781 99567 104949 124867 128427 135369 143819 146583 155733 164151 168831 200873 211731 227217 237107 239499 264069 278343 298701 345943 374601 381433 385281 406107 431457 467199 492453 556517 602619 635193 674843 681651 711321 718497 792207 917501 984607 1037829 1123803 1144299 1155843 1294371 1401597 1623271 1669551 1807857 1905579 2024529 2044953 2133963 2611349 2752503 2953821 3113487 3371409 3432897 3883113 4620079 4869813 5008653 5423571 6073587 6401889 7834047 8257509 8772959 8861463 9340461 10298691 12799891 13860237 14609439 15025959 18220761 21102523 23502141 24772527 26318877 26584389 33947537 38399673 41580711 43828317 60061027 63307569 70506423 78956631 101842611 115199019 124742133 180183081 189922707 236869893 305527833 345597057 540549243 569768121 780793351 916583499 1621647729 2342380053 7027140159 21081420477
• Sum of all divisors σ(n): 37251187200
• Sum of proper divisors (its aliquot sum) s(n): 16169766723
• 21081420477 is a deficient number, because the sum of its proper divisors (16169766723) is less than itself. Its deficiency is 4911653754

Bases of 21081420477

• Binary: 10011101000100011001111001010111101₂
• Hexadecimal: 0x4E88CF2BD
• Base-36: 9ONC059

Squares and roots of 21081420477

• 21081420477 squared (21081420477²) is 444426289328074907529
• 21081420477 cubed (21081420477³) is 9369137476358004926571742071333
• The square root of 21081420477 is 145194.4230230625
• The cube root of 21081420477 is 2762.4851800819

Scales and comparisons

• 21,081,420,477 seconds is equal to 670 years, 16 weeks, 5 days, 22 hours, 7 minutes, 57 seconds.
• To count from 1 to 21,081,420,477 would take you about one thousand, three hundred forty 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 21081420477 cubic inches would be around 230.2 feet tall.

Recreational maths with 21081420477

• 21081420477 backwards is 77402418012
• The number of decimal digits it has is: 11
• The sum of 21081420477's digits is 36
• More coming soon!