21311978688

Names of 21311978688

• Cardinal: 21311978688 can be written as Twenty-one billion, three hundred eleven million, nine hundred seventy-eight thousand, six hundred eighty-eight.

Scientific notation

• Scientific notation: 2.1311978688 × 10¹⁰

Factors of 21311978688

• Number of distinct prime factors ω(n): 6
• Total number of prime factors Ω(n): 16
• Sum of prime factors: 73

Divisors of 21311978688

• Number of divisors d(n): 1008
• Complete list of divisors:
  1 2 3 4 6 7 8 9 11 12 13 14 16 18 21 22 24 26 27 28 32 33 36 37 39 42 44 48 52 54 56 63 64 66 72 74 77 78 81 84 88 91 96 99 104 108 111 112 117 126 132 143 144 148 154 156 162 168 176 182 189 192 198 208 216 222 224 231 234 243 252 259 264 273 286 288 296 297 308 312 324 333 336 351 352 364 378 396 407 416 429 432 444 448 462 468 481 486 504 518 528 546 567 572 576 592 594 616 624 648 666 672 693 702 704 728 756 777 792 814 819 832 858 864 888 891 924 936 962 972 999 1001 1008 1036 1053 1056 1092 1134 1144 1184 1188 1221 1232 1248 1287 1296 1332 1344 1369 1386 1404 1443 1456 1512 1554 1584 1628 1638 1701 1716 1728 1776 1782 1848 1872 1924 1944 1998 2002 2016 2072 2079 2106 2112 2184 2268 2288 2331 2368 2376 2442 2457 2464 2496 2574 2592 2664 2673 2738 2772 2808 2849 2886 2912 2997 3003 3024 3108 3159 3168 3256 3276 3367 3402 3432 3552 3564 3663 3696 3744 3848 3861 3888 3996 4004 4032 4107 4144 4158 4212 4329 4368 4536 4576 4662 4752 4884 4914 4928 5148 5184 5291 5328 5346 5476 5544 5616 5698 5772 5824 5994 6006 6048 6216 6237 6318 6336 6512 6552 6734 6804 6864 6993 7104 7128 7326 7371 7392 7488 7696 7722 7776 7992 8008 8214 8288 8316 8424 8547 8658 8736 8991 9009 9072 9152 9324 9504 9583 9768 9828 10101 10296 10582 10656 10692 10952 10989 11088 11232 11396 11544 11583 11988 12012 12096 12321 12432 12474 12636 12987 13024 13104 13468 13608 13728 13986 14256 14652 14742 14784 15059 15392 15444 15552 15873 15984 16016 16428 16576 16632 16848 17094 17316 17472 17797 17982 18018 18144 18648 18711 19008 19166 19536 19656 20202 20592 20979 21164 21312 21384 21904 21978 22113 22176 22464 22792 23088 23166 23976 24024 24642 24864 24948 25272 25641 25974 26048 26208 26936 27027 27216 27456 27972 28512 28749 29304 29484 30118 30303 30784 30888 31746 31968 32032 32856 32967 33264 33696 34188 34632 34749 35594 35964 36036 36288 36963 37037 37296 37422 38332 38961 39072 39312 40404 41184 41958 42328 42768 43808 43956 44226 44352 45177 45584 46176 46332 47619 47952 48048 49284 49728 49896 50544 51282 51948 52416 53391 53872 54054 54432 55944 57024 57498 58608 58968 60236 60606 61776 62937 63492 63936 64064 65712 65934 66528 67392 68376 69264 69498 71188 71928 72072 73926 74074 74592 74844 76664 76923 77922 78144 78624 80808 81081 82368 83916 84656 85536 86247 87616 87912 88452 90354 90909 91168 92352 92664 95238 95904 96096 98568 98901 99792 101088 102564 103896 105413 106782 107744 108108 108864 110889 111111 111888 114996 116883 117216 117936 120472 121212 123552 124579 125874 126984 131424 131868 133056 135531 136752 138528 138996 142376 142857 143856 144144 147852 148148 149184 149688 153328 153846 155844 157248 160173 161616 162162 167832 169312 171072 172494 175824 176904 180708 181818 182336 185328 190476 191808 192192 195767 197136 197802 199584 202176 205128 207792 210826 213564 215488 216216 221778 222222 223776 229992 230769 233766 234432 235872 240944 242424 243243 247104 249158 251748 253968 258741 262848 263736 271062 272727 273504 277056 277992 284752 285714 287712 288288 295704 296296 299376 306656 307692 311688 316239 320346 323232 324324 332667 333333 335664 338624 344988 351648 353808 361416 363636 370656 373737 380952 391534 394272 395604 399168 406593 410256 415584 421652 427128 428571 432432 443556 444444 447552 459984 461538 467532 471744 480519 481888 484848 486486 498316 503496 507936 517482 527472 542124 545454 547008 555984 569504 571428 575424 576576 587301 591408 592592 598752 613312 615384 623376 632478 640692 646464 648648 665334 666666 671328 689976 692307 703296 707616 722832 727272 741312 747474 761904 776223 783068 788544 791208 813186 818181 820512 831168 843304 854256 857142 864864 887112 888888 919968 923076 935064 948717 961038 963776 969696 972972 996632 999999 1006992 1015872 1034964 1054944 1084248 1090908 1111968 1121211 1139008 1142856 1174602 1182816 1185184 1197504 1219779 1230768 1246752 1264956 1281384 1285713 1297296 1330668 1333332 1342656 1370369 1379952 1384614 1415232 1441557 1445664 1454544 1494948 1523808 1552446 1566136 1582416 1626372 1636362 1641024 1686608 1708512 1714284 1729728 1761903 1774224 1777776 1839936 1846152 1870128 1897434 1922076 1939392 1945944 1993264 1999998 2013984 2069928 2109888 2168496 2181816 2223936 2242422 2285712 2328669 2349204 2365632 2370368 2439558 2461536 2493504 2529912 2562768 2571426 2594592 2661336 2666664 2740738 2759904 2769228 2846151 2883114 2891328 2909088 2989896 2999997 3047616 3104892 3132272 3164832 3252744 3272724 3363633 3373216 3417024 3428568 3523806 3548448 3555552 3659337 3692304 3740256 3794868 3844152 3891888 3986528 3999996 4027968 4111107 4139856 4324671 4336992 4363632 4484844 4571424 4657338 4698408 4879116 4923072 5059824 5125536 5142852 5189184 5285709 5322672 5333328 5481476 5519808 5538456 5692302 5766228 5818176 5979792 5999994 6209784 6264544 6329664 6505488 6545448 6727266 6746432 6857136 7047612 7096896 7111104 7318674 7384608 7480512 7589736 7688304 7783776 7973056 7999992 8222214 8279712 8538453 8649342 8673984 8727264 8969688 8999991 9142848 9314676 9396816 9758232 10090899 10119648 10251072 10285704 10571418 10645344 10666656 10962952 11076912 11384604 11532456 11959584 11999988 12333321 12419568 12529088 13010976 13090896 13454532 13714272 14095224 14637348 14769216 15179472 15376608 15567552 15857127 15999984 16444428 16559424 17076906 17298684 17454528 17939376 17999982 18629352 18793632 19516464 20181798 20239296 20571408 21142836 21290688 21333312 21925904 22153824 22769208 23064912 23919168 23999976 24666642 24839136 25615359 26021952 26181792 26909064 27428544 28190448 29274696 30272697 30358944 30753216 31714254 31999968 32888856 34153812 34597368 35878752 35999964 36999963 37258704 37587264 39032928 40363596 41142816 42285672 43851808 44307648 45538416 46129824 47571381 47999952 49333284 49678272 51230718 52363584 53818128 56380896 58549392 60545394 60717888 63428508 63999936 65777712 68307624 69194736 71757504 71999928 73999926 74517408 78065856 80727192 82285632 84571344 87703616 91076832 92259648 95142762 95999904 98666568 102461436 107636256 110999889 112761792 117098784 121090788 126857016 131555424 136615248 138389472 143999856 147999852 149034816 161454384 169142688 182153664 190285524 191999808 197333136 204922872 215272512 221999778 234197568 242181576 253714032 263110848 273230496 276778944 287999712 295999704 322908768 332999667 338285376 380571048 394666272 409845744 443999556 484363152 507428064 546460992 575999424 591999408 645817536 665999334 761142096 789332544 819691488 887999112 968726304 1014856128 1183998816 1331998668 1522284192 1639382976 1775998224 1937452608 2367997632 2663997336 3044568384 3551996448 5327994672 7103992896 10655989344 21311978688
• Sum of all divisors σ(n): 87417517824
• Sum of proper divisors (its aliquot sum) s(n): 66105539136
• 21311978688 is an abundant number, because the sum of its proper divisors (66105539136) is greater than itself. Its abundance is 44793560448

Bases of 21311978688

• Binary: 10011110110010010101111110011000000₂
• Hexadecimal: 0x4F64AFCC0
• Base-36: 9SGLO00

Squares and roots of 21311978688

• 21311978688 squared (21311978688²) is 454200435597766201344
• 21311978688 cubed (21311978688³) is 9679910003539909823450044956672
• The square root of 21311978688 is 145986.2277339887
• The cube root of 21311978688 is 2772.5193831979

Scales and comparisons

• 21,311,978,688 seconds is equal to 677 years, 34 weeks, 10 hours, 4 minutes, 48 seconds.
• To count from 1 to 21,311,978,688 would take you about one thousand, three hundred fifty-five 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 21311978688 cubic inches would be around 231 feet tall.

Recreational maths with 21311978688

• 21311978688 backwards is 88687911312
• 21311978688 is a Harshad number.
• The number of decimal digits it has is: 11
• The sum of 21311978688's digits is 54
• More coming soon!