21351847968

Names of 21351847968

• Cardinal: 21351847968 can be written as Twenty-one billion, three hundred fifty-one million, eight hundred forty-seven thousand, nine hundred sixty-eight.

Scientific notation

• Scientific notation: 2.1351847968 × 10¹⁰

Factors of 21351847968

• Number of distinct prime factors ω(n): 7
• Total number of prime factors Ω(n): 13
• Sum of prime factors: 208

Divisors of 21351847968

• Number of divisors d(n): 768
• Complete list of divisors:
  1 2 3 4 6 8 9 11 12 16 18 19 22 23 24 27 32 33 36 38 44 46 48 53 54 57 66 69 72 76 88 92 96 97 99 106 108 114 132 138 144 152 159 171 176 184 194 198 207 209 212 216 228 253 264 276 288 291 297 304 318 342 352 368 388 396 414 418 424 432 437 456 477 506 513 528 552 582 583 594 608 621 627 636 684 736 759 776 792 828 836 848 864 873 874 912 954 1007 1012 1026 1056 1067 1104 1164 1166 1188 1219 1242 1254 1272 1311 1368 1431 1518 1552 1584 1656 1672 1696 1746 1748 1749 1824 1843 1881 1908 2014 2024 2052 2134 2208 2231 2277 2328 2332 2376 2438 2484 2508 2544 2619 2622 2736 2862 3021 3036 3104 3168 3201 3312 3344 3492 3496 3498 3657 3686 3762 3816 3933 4028 4048 4104 4268 4462 4554 4656 4664 4752 4807 4876 4968 5016 5088 5141 5238 5244 5247 5472 5529 5643 5724 6042 6072 6402 6624 6688 6693 6831 6984 6992 6996 7314 7372 7524 7632 7866 8056 8096 8208 8536 8924 9063 9108 9312 9328 9504 9603 9614 9752 9936 10032 10282 10476 10488 10494 10971 11058 11077 11286 11448 11799 12084 12144 12804 13386 13409 13662 13968 13984 13992 14421 14628 14744 15048 15264 15423 15732 15741 16112 16416 16587 17072 17848 18126 18216 18656 19206 19228 19504 19872 20064 20079 20273 20564 20952 20976 20988 21942 22116 22154 22572 22896 23161 23598 24168 24288 24541 25608 26772 26818 27189 27324 27936 27984 28809 28842 29256 29488 30096 30846 31464 31482 32224 32913 33174 33231 34144 35696 36252 36432 38412 38456 39008 40158 40227 40546 41128 41904 41952 41976 42389 43263 43884 44232 44308 45144 45792 46269 46322 47196 48336 49082 49761 51216 53544 53636 54378 54648 55968 56551 57618 57684 58512 58976 60192 60237 60819 61692 62928 62964 65826 66348 66462 69483 71392 72504 72864 73623 76824 76912 80316 80454 81092 82256 83808 83952 84778 86526 87768 88464 88616 90288 92538 92644 94392 96672 97679 98164 99522 99693 102432 107088 107272 108756 109296 113102 115236 115368 117024 118243 120474 120681 121638 123384 125856 125928 127167 129789 131652 132696 132924 138807 138966 145008 147246 153648 153824 160632 160908 162184 164512 167904 169556 169653 173052 175536 176928 177232 180576 182457 185076 185288 188784 195358 196328 199044 199386 208449 214176 214544 217512 218592 220869 226204 230472 230736 236486 240948 241362 243276 246768 251856 254334 254771 259578 263304 265392 265848 277614 277932 290016 293037 294492 299079 307296 321264 321816 324368 339112 339306 346104 351072 354464 354729 362043 364914 370152 370576 377568 381501 390716 392656 398088 398772 416898 429088 435024 441738 452408 460944 461472 466279 472972 481896 482724 486552 493536 503712 508668 508959 509542 519156 526608 530784 531696 547371 555228 555864 586074 588984 598158 625347 642528 643632 648736 662607 678224 678612 692208 709458 724086 729828 740304 741152 763002 764313 781432 785312 796176 797544 833796 870048 879111 883476 904816 921888 932558 945944 963792 965448 973104 1017336 1017918 1019084 1038312 1053216 1063392 1064187 1074469 1094742 1110456 1111728 1144503 1172148 1177968 1196316 1250694 1287264 1300673 1325214 1356448 1357224 1384416 1398837 1418916 1448172 1459656 1480608 1526004 1526877 1528626 1562864 1592352 1595088 1667592 1758222 1766952 1809632 1865116 1891888 1927584 1930896 1946208 2034672 2035836 2038168 2076624 2128374 2148938 2189484 2220912 2223456 2246617 2289006 2292939 2344296 2355936 2392632 2501388 2601346 2637333 2650428 2714448 2797674 2837832 2896344 2919312 3052008 3053754 3057252 3125728 3190176 3192561 3223407 3335184 3516444 3533904 3730232 3783776 3861792 3902019 4069344 4071672 4076336 4153248 4196511 4256748 4297876 4378968 4441824 4493234 4578012 4585878 4688592 4785264 5002776 5202692 5274666 5300856 5428896 5595348 5675664 5792688 5838624 6104016 6107508 6114504 6385122 6446814 6670368 6739851 6878817 7032888 7067808 7460464 7804038 8143344 8152672 8393022 8513496 8595752 8757936 8986468 9156024 9171756 9377184 9570528 9670221 10005552 10405384 10549332 10601712 11190696 11351328 11585376 11706057 12208032 12215016 12229008 12589533 12770244 12893628 13479702 13757634 14065776 14920928 15608076 16286688 16786044 17026992 17191504 17515872 17972936 18312048 18343512 19340442 20011104 20219553 20810768 21098664 21203424 22381392 23412114 24430032 24458016 24712787 25179066 25540488 25787256 26959404 27515268 28131552 29010663 31216152 33572088 34053984 34383008 35118171 35945872 36624096 36687024 38680884 40439106 41621536 42197328 44762784 46824228 48860064 49425574 50358132 51080976 51574512 53918808 55030536 58021326 60658659 62432304 67144176 70236342 71891744 73374048 74138361 77361768 80878212 84394656 93648456 98851148 100716264 102161952 103149024 107837616 110061072 116042652 121317318 124864608 134288352 140472684 148276722 154723536 161756424 187296912 197702296 201432528 215675232 220122144 222415083 232085304 242634636 280945368 296553444 309447072 323512848 374593824 395404592 402865056 444830166 464170608 485269272 561890736 593106888 647025696 667245249 790809184 889660332 928341216 970538544 1123781472 1186213776 1334490498 1779320664 1941077088 2372427552 2668980996 3558641328 5337961992 7117282656 10675923984 21351847968
• Sum of all divisors σ(n): 76814438400
• Sum of proper divisors (its aliquot sum) s(n): 55462590432
• 21351847968 is an abundant number, because the sum of its proper divisors (55462590432) is greater than itself. Its abundance is 34110742464

Bases of 21351847968

• Binary: 10011111000101010110101100000100000₂
• Hexadecimal: 0x4F8AB5820
• Base-36: 9T4C7C0

Squares and roots of 21351847968

• 21351847968 squared (21351847968²) is 455901411648585729024
• 21351847968 cubed (21351847968³) is 9734337629917186728334893023232
• The square root of 21351847968 is 146122.7154415083
• The cube root of 21351847968 is 2774.2471985747

Scales and comparisons

• 21,351,847,968 seconds is equal to 678 years, 47 weeks, 6 days, 20 hours, 52 minutes, 48 seconds.
• To count from 1 to 21,351,847,968 would take you about one thousand, three hundred fifty-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 21351847968 cubic inches would be around 231.2 feet tall.

Recreational maths with 21351847968

• 21351847968 backwards is 86974815312
• 21351847968 is a Harshad number.
• The number of decimal digits it has is: 11
• The sum of 21351847968's digits is 54
• More coming soon!