21505942908

Names of 21505942908

• Cardinal: 21505942908 can be written as Twenty-one billion, five hundred five million, nine hundred forty-two thousand, nine hundred eight.

Scientific notation

• Scientific notation: 2.1505942908 × 10¹⁰

Factors of 21505942908

• Number of distinct prime factors ω(n): 6
• Total number of prime factors Ω(n): 10
• Sum of prime factors: 1027

Divisors of 21505942908

• Number of divisors d(n): 240
• Complete list of divisors:
  1 2 3 4 6 9 12 18 19 23 27 36 38 46 54 57 69 76 81 92 108 114 138 162 171 193 207 228 276 324 342 386 414 437 513 579 621 684 772 787 828 874 1026 1158 1242 1311 1539 1574 1737 1748 1863 2052 2316 2361 2484 2622 3078 3148 3474 3667 3726 3933 4439 4722 5211 5244 6156 6948 7083 7334 7452 7866 8878 9444 10422 11001 11799 13317 14166 14668 14953 15633 15732 17756 18101 20844 21249 22002 23598 26634 28332 29906 31266 33003 35397 36202 39951 42498 44004 44859 47196 53268 54303 59812 62532 63747 66006 70794 72404 79902 84341 84996 89718 99009 108606 119853 127494 132012 134577 141588 151891 159804 162909 168682 179436 198018 217212 239706 253023 254988 269154 297027 303782 325818 337364 343919 359559 396036 403731 455673 479412 488727 506046 538308 594054 607564 651636 687838 719118 759069 807462 911346 977454 1012092 1031757 1188108 1211193 1367019 1375676 1438236 1466181 1518138 1614924 1822692 1954908 2063514 2277207 2422386 2734038 2885929 2932362 3036276 3095271 3493493 4101057 4127028 4554414 4844772 5468076 5771858 5864724 6190542 6831621 6986986 8202114 8657787 9108828 9285813 10480479 11543716 12303171 12381084 13663242 13973972 16404228 17315574 18571626 20960958 24606342 25973361 27326484 27857439 31441437 34631148 37143252 41921916 49212684 51946722 55714878 62882874 66376367 77920083 94324311 103893444 111429756 125765748 132752734 155840166 188648622 199129101 233760249 265505468 282972933 311680332 377297244 398258202 467520498 565945866 597387303 796516404 935040996 1131891732 1194774606 1792161909 2389549212 3584323818 5376485727 7168647636 10752971454 21505942908
• Sum of all divisors σ(n): 62151640320
• Sum of proper divisors (its aliquot sum) s(n): 40645697412
• 21505942908 is an abundant number, because the sum of its proper divisors (40645697412) is greater than itself. Its abundance is 19139754504

Bases of 21505942908

• Binary: 10100000001110110101010010101111100₂
• Hexadecimal: 0x501DAA57C
• Base-36: 9VO2ZR0

Squares and roots of 21505942908

• 21505942908 squared (21505942908²) is 462505580362155496464
• 21505942908 cubed (21505942908³) is 9946618605899922070773179877312
• The square root of 21505942908 is 146649.0467340309
• The cube root of 21505942908 is 2780.9050633867

Scales and comparisons

• 21,505,942,908 seconds is equal to 683 years, 42 weeks, 5 days, 9 hours, 1 minute, 48 seconds.
• To count from 1 to 21,505,942,908 would take you about one thousand, three hundred sixty-seven 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 21505942908 cubic inches would be around 231.7 feet tall.

Recreational maths with 21505942908

• 21505942908 backwards is 80924950512
• The number of decimal digits it has is: 11
• The sum of 21505942908's digits is 45
• More coming soon!