21268640640

Names of 21268640640

• Cardinal: 21268640640 can be written as Twenty-one billion, two hundred sixty-eight million, six hundred forty thousand, six hundred forty.

Scientific notation

• Scientific notation: 2.126864064 × 10¹⁰

Factors of 21268640640

• Number of distinct prime factors ω(n): 6
• Total number of prime factors Ω(n): 13
• Sum of prime factors: 313

Divisors of 21268640640

• Number of divisors d(n): 384
• Complete list of divisors:
  1 2 3 4 5 6 8 10 12 13 15 16 20 24 26 30 32 39 40 48 52 60 61 64 65 78 80 96 104 120 122 128 130 156 160 183 192 195 208 229 240 244 260 305 312 320 366 384 390 416 458 480 488 520 610 624 640 687 732 780 793 832 915 916 960 976 1040 1145 1220 1248 1374 1464 1560 1586 1664 1830 1832 1920 1952 2080 2290 2379 2440 2496 2748 2928 2977 3120 3172 3435 3660 3664 3721 3904 3965 4160 4580 4758 4880 4992 5496 5856 5954 6240 6344 6870 7320 7328 7442 7808 7930 8320 8931 9160 9516 9760 10992 11163 11712 11895 11908 12480 12688 13740 13969 14640 14656 14884 14885 15860 17862 18320 18605 19032 19520 21984 22326 23424 23790 23816 24960 25376 27480 27938 29280 29312 29768 29770 31720 35724 36640 37210 38064 39040 41907 43968 44652 44655 47580 47632 48373 50752 54960 55815 55876 58560 59536 59540 63440 69845 71448 73280 74420 76128 83814 87936 89304 89310 95160 95264 96746 101504 109920 111630 111752 117120 119072 119080 126880 139690 142896 145119 146560 148840 152256 167628 178608 178620 181597 190320 190528 193492 209535 219840 223260 223504 238144 238160 241865 253760 279380 285792 290238 297680 304512 335256 357216 357240 363194 380640 381056 386984 419070 439680 446520 447008 476288 476320 483730 507520 544791 558760 571584 580476 595360 670512 714432 714480 725595 726388 761280 773968 838140 852109 893040 894016 907985 952640 967460 1089582 1117520 1143168 1160952 1190720 1341024 1428864 1428960 1451190 1452776 1522560 1547936 1676280 1704218 1786080 1788032 1815970 1905280 1934920 2179164 2235040 2321904 2381440 2556327 2682048 2723955 2857920 2902380 2905552 3095872 3352560 3408436 3572160 3631940 3869840 4260545 4358328 4470080 4643808 5112654 5364096 5447910 5715840 5804760 5811104 6191744 6705120 6816872 7144320 7263880 7739680 8521090 8716656 8940160 9287616 10225308 10895820 11077417 11609520 11622208 12781635 13410240 13633744 14527760 15479360 17042180 17433312 18575232 20450616 21791640 22154834 23219040 23244416 25563270 26820480 27267488 29055520 30958720 33232251 34084360 34866624 40901232 43583280 44309668 46438080 51126540 54534976 55387085 58111040 66464502 68168720 69733248 81802464 87166560 88619336 92876160 102253080 109069952 110774170 116222080 132929004 136337440 163604928 166161255 174333120 177238672 204506160 221548340 265858008 272674880 327209856 332322510 348666240 354477344 409012320 443096680 531716016 545349760 664645020 708954688 818024640 886193360 1063432032 1329290040 1417909376 1636049280 1772386720 2126864064 2658580080 3544773440 4253728128 5317160160 7089546880 10634320320 21268640640
• Sum of all divisors σ(n): 74549311200
• Sum of proper divisors (its aliquot sum) s(n): 53280670560
• 21268640640 is an abundant number, because the sum of its proper divisors (53280670560) is greater than itself. Its abundance is 32012029920

Bases of 21268640640

• Binary: 10011110011101101011011001110000000₂
• Hexadecimal: 0x4F3B5B380
• Base-36: 9RQSS5C

Squares and roots of 21268640640

• 21268640640 squared (21268640640²) is 452355074673459609600
• 21268640640 cubed (21268640640³) is 9620977524910177782137094144000
• The square root of 21268640640 is 145837.7202235417
• The cube root of 21268640640 is 2770.6387957947

Scales and comparisons

• 21,268,640,640 seconds is equal to 676 years, 14 weeks, 2 days, 19 hours, 44 minutes.
• To count from 1 to 21,268,640,640 would take you about one thousand, three hundred fifty-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 21268640640 cubic inches would be around 230.9 feet tall.

Recreational maths with 21268640640

• 21268640640 backwards is 04604686212
• 21268640640 is a Harshad number.
• The number of decimal digits it has is: 11
• The sum of 21268640640's digits is 39
• More coming soon!