21285847440

Names of 21285847440

• Cardinal: 21285847440 can be written as Twenty-one billion, two hundred eighty-five million, eight hundred forty-seven thousand, four hundred forty.

Scientific notation

• Scientific notation: 2.128584744 × 10¹⁰

Factors of 21285847440

• Number of distinct prime factors ω(n): 7
• Total number of prime factors Ω(n): 15
• Sum of prime factors: 84

Divisors of 21285847440

• Number of divisors d(n): 1440
• Complete list of divisors:
  1 2 3 4 5 6 8 9 10 11 12 13 15 16 18 19 20 22 24 26 27 30 31 33 36 38 39 40 44 45 48 52 54 55 57 60 62 65 66 72 76 78 80 81 88 90 93 95 99 104 108 110 114 117 120 124 130 132 135 143 144 152 155 156 162 165 169 171 176 180 186 190 195 198 208 209 216 220 228 234 240 243 247 248 260 264 270 279 285 286 297 304 310 312 324 330 338 341 342 351 360 372 380 390 396 403 405 418 429 432 440 456 465 468 486 494 495 496 507 513 520 528 540 558 570 572 585 589 594 620 624 627 648 660 676 682 684 702 715 720 741 744 760 780 792 806 810 836 837 845 855 858 880 891 912 930 936 972 988 990 1014 1023 1026 1040 1045 1053 1080 1116 1140 1144 1170 1178 1188 1209 1215 1235 1240 1254 1287 1296 1320 1352 1364 1368 1395 1404 1430 1482 1485 1488 1520 1521 1539 1560 1584 1612 1620 1672 1674 1690 1705 1710 1716 1755 1767 1782 1859 1860 1872 1881 1944 1976 1980 2015 2028 2046 2052 2090 2106 2145 2160 2223 2232 2280 2288 2340 2356 2376 2418 2430 2470 2480 2508 2511 2535 2565 2574 2640 2673 2704 2717 2728 2736 2790 2808 2860 2945 2964 2970 3042 3069 3078 3120 3135 3159 3211 3224 3240 3344 3348 3380 3410 3420 3432 3510 3534 3564 3627 3705 3718 3720 3762 3861 3888 3952 3960 4030 4056 4092 4104 4180 4185 4212 4290 4433 4446 4455 4464 4560 4563 4617 4680 4712 4752 4836 4860 4940 5016 5022 5070 5115 5130 5148 5239 5265 5301 5346 5434 5456 5577 5580 5616 5643 5720 5890 5928 5940 6045 6084 6138 6156 6270 6318 6422 6435 6448 6479 6480 6669 6696 6760 6820 6840 6864 7020 7068 7128 7254 7410 7436 7440 7524 7533 7605 7657 7695 7722 7920 8060 8112 8151 8184 8208 8360 8370 8424 8580 8835 8866 8892 8910 9126 9207 9234 9295 9360 9405 9424 9633 9672 9720 9880 10032 10044 10140 10230 10260 10296 10478 10530 10602 10692 10868 10881 11115 11154 11160 11286 11440 11583 11780 11856 11880 12090 12168 12276 12312 12540 12555 12636 12844 12870 12958 13299 13338 13365 13392 13520 13585 13640 13680 13689 14040 14136 14256 14508 14820 14872 15048 15066 15210 15314 15345 15390 15444 15717 15795 15903 16055 16120 16302 16368 16720 16731 16740 16848 16929 17160 17670 17732 17784 17820 18135 18252 18414 18468 18590 18810 19266 19305 19344 19437 19440 19760 20007 20088 20280 20460 20520 20592 20956 21060 21204 21384 21736 21762 22165 22230 22308 22320 22572 22815 22971 23085 23166 23560 23760 24180 24336 24453 24552 24624 25080 25110 25272 25688 25740 25916 26195 26505 26598 26676 26730 27170 27280 27378 27621 27885 28080 28215 28272 28899 29016 29640 29744 30096 30132 30420 30628 30690 30780 30888 31434 31590 31806 32110 32240 32395 32604 32643 33345 33462 33480 33858 34320 34749 35321 35340 35464 35568 35640 36270 36504 36828 36936 37180 37620 37665 38285 38532 38610 38874 39897 40014 40176 40560 40755 40920 41040 41067 41912 42120 42408 42768 43472 43524 44330 44460 44616 45144 45630 45942 46035 46170 46332 47120 47151 47709 48165 48360 48906 49104 50160 50193 50220 50544 50787 51376 51480 51832 52390 53010 53196 53352 53460 54340 54405 54756 55242 55770 56430 57629 57798 57915 58032 58311 59280 60021 60264 60840 61256 61380 61560 61776 62868 63180 63612 64220 64790 65208 65286 66495 66690 66924 66960 67716 68445 68913 69498 70642 70680 70928 71280 72540 73008 73359 73656 73872 74360 75240 75330 76570 77064 77220 77748 78585 79515 79794 80028 81510 81840 82134 82863 83655 83824 84227 84240 84645 84816 86697 87048 88660 88920 89232 90288 91260 91884 92070 92340 92664 94302 95418 96330 96720 97185 97812 97929 99541 100035 100386 100440 101574 102960 103664 104780 105963 106020 106392 106704 106920 108680 108810 109512 110484 111540 112860 114855 115258 115596 115830 116622 119691 120042 120528 121680 122265 122512 122760 123120 125736 126360 127224 128440 129580 130416 130572 132990 133380 133848 135432 136890 137826 138105 138996 141284 141360 141453 143127 144495 145080 146718 147312 148720 150480 150579 150660 153140 154128 154440 155496 157170 159030 159588 160056 163020 163215 164268 165726 167310 168454 169290 172887 173394 173745 174096 174933 176605 177320 177840 182520 183768 184140 184680 185328 188604 190836 192660 194370 195624 195858 199082 199485 200070 200772 200880 203148 205335 206739 209560 211926 212040 212784 213840 217360 217620 219024 220077 220968 223080 225720 229710 230516 231192 231660 233244 235755 238545 239382 240084 244530 245520 250965 251472 252681 252720 253935 254448 256880 259160 260091 261144 265980 266760 267696 270864 273780 275652 276210 277992 282568 282906 286254 288145 288990 290160 291555 293436 298623 300105 301158 301320 306280 308880 310992 314340 317889 318060 319176 320112 326040 326430 328536 331452 334620 336908 338580 344565 345774 346788 347490 349866 353210 354640 359073 365040 366795 367536 368280 369360 377208 381672 385320 388740 391248 391716 398164 398970 400140 401544 406296 410670 413478 414315 419120 421135 423852 424080 424359 433485 435240 440154 441936 446160 451440 451737 459420 461032 462384 463320 466488 471510 477090 478764 480168 489060 489645 497705 501930 505362 507870 518320 518661 520182 522288 524799 529815 531960 533520 547560 551304 552420 555984 565136 565812 572508 576290 577980 583110 586872 597246 598455 600210 602316 602640 612560 620217 628680 635778 636120 638352 652080 652860 657072 660231 662904 669240 673816 677160 689130 691548 693576 694980 699732 706420 707265 715635 718146 733590 736560 752895 754416 758043 763344 770640 777480 780273 783432 796328 797940 800280 803088 812592 821340 826956 828630 842270 847704 848718 864435 866970 870480 874665 880308 895869 903474 918840 922064 926640 932976 943020 953667 954180 957528 960336 978120 979290 995410 1003860 1010724 1015740 1033695 1037322 1040364 1049598 1059630 1063920 1077219 1094951 1095120 1100385 1102608 1104840 1131624 1145016 1152580 1155960 1166220 1173744 1194492 1196910 1200420 1204632 1240434 1257360 1263405 1271556 1272240 1273077 1300455 1305720 1320462 1325808 1338480 1347632 1354320 1378260 1383096 1387152 1389960 1399464 1412840 1414530 1431270 1436292 1467180 1493115 1505790 1516086 1554960 1555983 1560546 1566864 1574397 1589445 1592656 1595880 1600560 1642680 1653912 1657260 1684540 1695408 1697436 1728870 1733940 1749330 1760616 1791738 1795365 1806948 1837680 1860651 1886040 1907334 1908360 1915056 1956240 1958580 1990820 2007720 2021448 2031480 2067390 2074644 2080728 2099196 2119260 2121795 2154438 2189902 2200770 2209680 2258685 2263248 2274129 2290032 2305160 2311920 2332440 2388984 2393820 2400840 2409264 2480868 2526810 2543112 2546154 2593305 2600910 2611440 2623995 2640924 2687607 2756520 2766192 2779920 2798928 2825680 2829060 2861001 2862540 2872584 2934360 2986230 3011580 3032172 3101085 3111966 3121092 3148794 3178890 3191760 3284853 3285360 3301155 3307824 3314520 3369080 3394872 3457740 3467880 3498660 3521232 3583476 3590730 3613896 3721302 3772080 3790215 3814668 3816720 3901365 3917160 3981640 4015440 4042896 4062960 4134780 4149288 4161456 4198392 4238520 4243590 4308876 4379804 4401540 4479345 4517370 4548258 4610320 4664880 4667949 4768335 4777968 4787640 4801680 4961736 5053620 5086224 5092308 5186610 5201820 5247990 5281848 5375214 5386095 5474755 5513040 5658120 5722002 5725080 5745168 5868720 5972460 6023160 6064344 6202170 6223932 6242184 6297588 6357780 6365385 6569706 6602310 6629040 6738160 6789744 6822387 6915480 6935760 6997320 7166952 7181460 7227792 7442604 7580430 7629336 7779915 7802730 7834320 7871985 7963280 8062821 8269560 8298576 8396784 8477040 8487180 8583003 8617752 8759608 8803080 8958690 9034740 9096516 9303255 9335898 9536670 9575280 9854559 9923472 10107240 10184616 10373220 10403640 10495980 10563696 10750428 10772190 10949510 11316240 11370645 11444004 11450160 11944920 12046320 12128688 12404340 12447864 12484368 12595176 12715560 12730770 13139412 13204620 13438035 13644774 13830960 13994640 14003847 14305005 14333904 14362920 14885208 15160860 15258672 15559830 15605460 15743970 16125642 16424265 16539120 16974360 17166006 17235504 17519216 17606160 17917380 18069480 18193032 18606510 18671796 19073340 19709118 20214480 20369232 20467161 20746440 20807280 20991960 21500856 21544380 21899020 22741290 22888008 23339745 23889840 24188463 24808680 24895728 25190352 25431120 25461540 26278824 26409240 26876070 27289548 28007694 28610010 28725840 29563677 29770416 30321720 31119660 31210920 31487940 32251284 32848530 33948720 34111935 34332012 35834760 36138960 36386064 37213020 37343592 38146680 39418236 40314105 40934322 41492880 41983920 42915015 43001712 43088760 43798040 45482580 45776016 46679490 48376926 49272795 49617360 50923080 52557648 52818480 53752140 54579096 56015388 57220020 59127354 60643440 62239320 62421840 62975880 64502568 65697060 68223870 68664024 70019235 71669520 74426040 74687184 76293360 78836472 80628210 81868644 85830030 86177520 87596080 88691031 90965160 93358980 96753852 98545590 101846160 102335805 107504280 109158192 112030776 114440040 118254708 120942315 124478640 125951760 129005136 131394120 136447740 137328048 140038470 147818385 148852080 157672944 161256420 163737288 171660060 177382062 181930320 186717960 193507704 197091180 204671610 215008560 224061552 228880080 236509416 241884630 262788240 266073093 272895480 280076940 295636770 322512840 327474576 343320120 354764124 373435920 387015408 394182360 409343220 443455155 473018832 483769260 532146186 545790960 560153880 591273540 645025680 686640240 709528248 788364720 818686440 886910310 967538520 1064292372 1120307760 1182547080 1330365465 1419056496 1637372880 1773820620 1935077040 2128584744 2365094160 2660730930 3547641240 4257169488 5321461860 7095282480 10642923720 21285847440
• Sum of all divisors σ(n): 95153909760
• Sum of proper divisors (its aliquot sum) s(n): 73868062320
• 21285847440 is an abundant number, because the sum of its proper divisors (73868062320) is greater than itself. Its abundance is 52582214880

Bases of 21285847440

• Binary: 10011110100101111000100000110010000₂
• Hexadecimal: 0x4F4BC4190
• Base-36: 9S11L00

Squares and roots of 21285847440

• 21285847440 squared (21285847440²) is 453087301238954553600
• 21285847440 cubed (21285847440³) is 9644347171173709613022902784000
• The square root of 21285847440 is 145896.7012649705
• The cube root of 21285847440 is 2771.3857637183

Scales and comparisons

• 21,285,847,440 seconds is equal to 676 years, 42 weeks, 5 days, 23 hours, 24 minutes.
• To count from 1 to 21,285,847,440 would take you about one thousand, three hundred fifty-three 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 21285847440 cubic inches would be around 230.9 feet tall.

Recreational maths with 21285847440

• 21285847440 backwards is 04474858212
• 21285847440 is a Harshad number.
• The number of decimal digits it has is: 11
• The sum of 21285847440's digits is 45
• More coming soon!