21396490479

Names of 21396490479

• Cardinal: 21396490479 can be written as Twenty-one billion, three hundred ninety-six million, four hundred ninety thousand, four hundred seventy-nine.

Scientific notation

• Scientific notation: 2.1396490479 × 10¹⁰

Factors of 21396490479

• Number of distinct prime factors ω(n): 6
• Total number of prime factors Ω(n): 9
• Sum of prime factors: 160

Divisors of 21396490479

• Number of divisors d(n): 216
• Complete list of divisors:
  1 3 7 9 13 17 21 39 49 51 59 61 63 91 117 119 147 153 177 183 221 273 357 413 427 441 531 549 637 663 767 793 819 833 1003 1037 1071 1239 1281 1547 1911 1989 2301 2379 2499 2891 2989 3009 3111 3599 3717 3721 3843 4641 5369 5551 5733 6903 7021 7137 7259 7497 8673 8967 9027 9333 10797 10829 11163 13039 13481 13923 16107 16653 21063 21777 25193 26019 26047 26901 32391 32487 33489 37583 38857 39117 40443 46787 48321 48373 49147 49959 50813 61183 63189 63257 65331 75579 78141 91273 94367 97461 112749 116571 117351 121329 140361 145119 147441 152439 176351 182329 183549 189771 219539 226737 234423 273819 283101 327509 338247 338611 349713 421083 428281 435357 442323 442799 457317 529053 546987 550647 569313 638911 658617 660569 795379 821457 822341 849303 982527 1015833 1284843 1328397 1536773 1587159 1640961 1916733 1975851 1981707 2292563 2370277 2386137 2467023 2854007 2947581 2997967 3047499 3099593 3732163 3854529 3985191 4610319 5567653 5750199 5756387 5945121 6877689 7110831 7158411 7401069 8562021 8993901 9298779 10757411 11196489 13830957 16702959 17269161 19978049 20633067 21332493 25686063 26125141 26981703 27896337 32272233 33589467 38973571 40294709 48518119 50108877 51807483 59934147 78375423 96816699 116920713 120884127 139846343 145554357 179802441 182875987 235126269 339626833 350762139 362652381 419539029 436663071 548627961 1018880499 1258617087 1645883883 2377387831 3056641497 7132163493 21396490479
• Sum of all divisors σ(n): 42384429360
• Sum of proper divisors (its aliquot sum) s(n): 20987938881
• 21396490479 is a deficient number, because the sum of its proper divisors (20987938881) is less than itself. Its deficiency is 408551598

Bases of 21396490479

• Binary: 10011111011010101001000100011101111₂
• Hexadecimal: 0x4FB5488EF
• Base-36: 9TUX1PR

Squares and roots of 21396490479

• 21396490479 squared (21396490479²) is 457809804817937649441
• 21396490479 cubed (21396490479³) is 9795523129979851244679996172239
• The square root of 21396490479 is 146275.3925956105
• The cube root of 21396490479 is 2776.1793208979

Scales and comparisons

• 21,396,490,479 seconds is equal to 680 years, 17 weeks, 5 days, 13 hours, 34 minutes, 39 seconds.
• To count from 1 to 21,396,490,479 would take you about one thousand, three hundred sixty 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 21396490479 cubic inches would be around 231.3 feet tall.

Recreational maths with 21396490479

• 21396490479 backwards is 97409469312
• The number of decimal digits it has is: 11
• The sum of 21396490479's digits is 54
• More coming soon!