21051507568

Names of 21051507568

• Cardinal: 21051507568 can be written as Twenty-one billion, fifty-one million, five hundred seven thousand, five hundred sixty-eight.

Scientific notation

• Scientific notation: 2.1051507568 × 10¹⁰

Factors of 21051507568

• Number of distinct prime factors ω(n): 7
• Total number of prime factors Ω(n): 10
• Sum of prime factors: 286

Divisors of 21051507568

• Number of divisors d(n): 320
• Complete list of divisors:
  1 2 4 7 8 13 14 16 26 28 37 52 53 56 73 74 91 101 104 106 112 146 148 182 202 208 212 259 292 296 364 371 404 424 481 511 518 584 592 689 707 728 742 808 848 949 962 1022 1036 1168 1313 1378 1414 1456 1484 1616 1898 1924 1961 2044 2072 2626 2701 2756 2828 2968 3367 3737 3796 3848 3869 3922 4088 4144 4823 5252 5353 5402 5512 5656 5936 6643 6734 7373 7474 7592 7696 7738 7844 8176 9191 9646 10504 10706 10804 11024 11312 13286 13468 13727 14746 14948 15184 15476 15688 18382 18907 19292 21008 21412 21608 25493 26159 26572 26936 27083 27454 29492 29896 30952 31376 35113 36764 37471 37814 38584 42824 43216 48581 50297 50986 51611 52318 53144 53872 54166 54908 58984 59792 61904 69589 70226 73528 74942 75628 77168 85648 95849 97162 100594 101972 103222 104636 106288 108332 109816 117968 139178 140452 143153 147056 149884 151256 178451 191698 194324 198061 201188 203944 206444 209272 216664 219632 245791 272801 278356 280904 286306 299768 302512 340067 352079 356902 383396 388648 390769 396122 402376 407888 412888 418544 433328 487123 491582 545602 556712 561808 572612 599536 670943 680134 704158 713804 766792 777296 781538 792244 804752 825776 974246 983164 1002071 1091204 1113424 1145224 1341886 1360268 1386427 1408316 1427608 1533584 1563076 1584488 1860989 1909607 1948492 1966328 2004142 2182408 2290448 2574793 2683772 2720536 2735383 2772854 2816632 2855216 3126152 3168976 3546413 3721978 3819214 3896984 3932656 4008284 4364816 5079997 5149586 5367544 5441072 5470766 5545708 5633264 6252304 7092826 7443956 7638428 7793968 8016568 10159994 10299172 10735088 10941532 11091416 13026923 14185652 14458453 14887912 15276856 16033136 18023551 20319988 20598344 21883064 22182832 24824891 26053846 28371304 28916906 29775824 30553712 35559979 36047102 40639976 41196688 43766128 49649782 52107692 56742608 57833812 71119958 72094204 81279952 99299564 101209171 104215384 115667624 142239916 144188408 187959889 198599128 202418342 208430768 231335248 284479832 288376816 375919778 397198256 404836684 568959664 751839556 809673368 1315719223 1503679112 1619346736 2631438446 3007358224 5262876892 10525753784 21051507568
• Sum of all divisors σ(n): 53776058112
• Sum of proper divisors (its aliquot sum) s(n): 32724550544
• 21051507568 is an abundant number, because the sum of its proper divisors (32724550544) is greater than itself. Its abundance is 11673042976

Bases of 21051507568

• Binary: 10011100110110001001000001101110000₂
• Hexadecimal: 0x4E6C48370
• Base-36: 9O5IV74

Squares and roots of 21051507568

• 21051507568 squared (21051507568²) is 443165970885561274624
• 21051507568 cubed (21051507568³) is 9329311789977460834674862354432
• The square root of 21051507568 is 145091.3766148767
• The cube root of 21051507568 is 2761.1779771751

Scales and comparisons

• 21,051,507,568 seconds is equal to 669 years, 19 weeks, 2 days, 16 hours, 59 minutes, 28 seconds.
• To count from 1 to 21,051,507,568 would take you about one thousand, three hundred thirty-eight 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 21051507568 cubic inches would be around 230.1 feet tall.

Recreational maths with 21051507568

• 21051507568 backwards is 86570515012
• The number of decimal digits it has is: 11
• The sum of 21051507568's digits is 40
• More coming soon!