21281817312

Names of 21281817312

• Cardinal: 21281817312 can be written as Twenty-one billion, two hundred eighty-one million, eight hundred seventeen thousand, three hundred twelve.

Scientific notation

• Scientific notation: 2.1281817312 × 10¹⁰

Factors of 21281817312

• Number of distinct prime factors ω(n): 7
• Total number of prime factors Ω(n): 13
• Sum of prime factors: 206

Divisors of 21281817312

• Number of divisors d(n): 768
• Complete list of divisors:
  1 2 3 4 6 7 8 9 12 14 16 18 19 21 24 27 28 32 36 38 42 43 48 54 56 57 59 63 72 73 76 84 86 96 108 112 114 118 126 129 133 144 146 152 168 171 172 177 189 216 219 224 228 236 252 258 266 288 292 301 304 336 342 344 354 378 387 399 413 432 438 456 472 504 511 513 516 531 532 584 602 608 657 672 684 688 708 756 774 798 817 826 864 876 903 912 944 1008 1022 1026 1032 1062 1064 1121 1161 1168 1197 1204 1239 1314 1368 1376 1387 1416 1512 1533 1548 1593 1596 1634 1652 1752 1806 1824 1888 1971 2016 2044 2052 2064 2124 2128 2242 2322 2336 2394 2408 2451 2478 2537 2628 2709 2736 2774 2832 3024 3066 3096 3139 3186 3192 3268 3304 3363 3504 3591 3612 3717 3942 4088 4104 4128 4161 4248 4256 4307 4484 4599 4644 4788 4816 4902 4956 5074 5256 5418 5472 5548 5664 5719 6048 6132 6192 6278 6372 6384 6536 6608 6726 7008 7182 7224 7353 7434 7611 7847 7884 8127 8176 8208 8322 8496 8614 8968 9198 9288 9417 9576 9632 9709 9804 9912 10089 10148 10512 10836 11096 11151 11438 12264 12384 12483 12556 12744 12768 12921 13072 13216 13452 13797 14364 14448 14706 14868 15222 15694 15768 16254 16352 16416 16644 16992 17157 17228 17759 17936 18396 18576 18834 19152 19418 19608 19824 20178 20296 21024 21672 21973 22059 22192 22302 22833 22876 23541 24528 24966 25112 25488 25842 26144 26904 27594 28251 28728 28896 29127 29412 29736 30149 30267 30444 31388 31536 32508 33288 34314 34456 35518 35872 36792 37152 37449 37668 38304 38763 38836 39216 39648 40356 40592 43344 43946 44118 44384 44604 45666 45752 47082 48203 49056 49932 50224 50976 51471 51684 53277 53808 55188 56502 57456 58254 58824 59472 59641 60298 60534 60888 62776 63072 65016 65919 66576 68499 68628 68912 70623 71036 73584 74898 75336 77526 77672 78432 80712 81184 81833 84753 86688 87381 87892 88236 89208 90447 91332 91504 94164 96406 99864 100448 102942 103368 106554 107616 110376 113004 114912 116289 116508 117648 118944 119282 120596 121068 121776 125552 130032 131838 133152 136998 137256 137824 141246 142072 144609 147168 149796 150672 154413 155052 155344 159831 161424 163666 169506 174762 175784 176472 178416 178923 180894 182664 183008 185201 188328 192812 197757 199728 205884 206736 211869 213108 220752 226008 232578 233016 235296 238564 241192 242136 243552 245499 251104 260064 262143 263676 271341 273996 274512 282492 284144 289218 299592 301344 308826 310104 310688 319662 322848 327332 337421 339012 349524 351568 352944 356832 357846 361788 365328 370402 376656 385624 395514 399456 411768 413472 417487 423738 426216 433827 441504 452016 465156 466032 477128 479493 482384 484272 490998 524286 527352 536769 542682 547992 549024 555603 564984 568288 572831 578436 593271 599184 617652 620208 639324 654664 674842 678024 699048 703136 705888 715692 723576 730656 736497 740804 753312 771248 791028 814023 823536 834974 847476 852432 867654 904032 930312 932064 954256 958986 964768 968544 981996 1012263 1048572 1054704 1073538 1085364 1095984 1111206 1129968 1145662 1156872 1186542 1198368 1235304 1240416 1252461 1278648 1296407 1301481 1309328 1349684 1356048 1398096 1431384 1447152 1472994 1481608 1542496 1582056 1610307 1628046 1647072 1666809 1669948 1694952 1704864 1718493 1735308 1860624 1908512 1917972 1963992 2024526 2097144 2109408 2147076 2170728 2191968 2209491 2222412 2259936 2291324 2313744 2373084 2470608 2504922 2557296 2592814 2602962 2618656 2699368 2712096 2796192 2862768 2894304 2945988 2963216 3036789 3164112 3220614 3256092 3333618 3339896 3389904 3436986 3470616 3518819 3721248 3757383 3835944 3889221 3927984 4049052 4194288 4294152 4341456 4418982 4444824 4582648 4627488 4746168 4941216 5000427 5009844 5114592 5155479 5185628 5205924 5398736 5725536 5891976 5926432 6073578 6328224 6441228 6512184 6667236 6679792 6779808 6873972 6941232 7037638 7514766 7671888 7778442 7855968 8098104 8388576 8588304 8682912 8837964 8889648 9110367 9165296 9492336 10000854 10019688 10310958 10371256 10411848 10556457 10797472 11272149 11667663 11783952 12147156 12882456 13024368 13334472 13359584 13747944 13882464 14075276 15029532 15343776 15466437 15556884 16196208 17176608 17675928 17779296 18220734 18330592 18984672 20001708 20039376 20621916 20742512 20823696 21112914 22544298 23335326 23567904 24294312 24631733 25764912 26048736 26668944 27495888 28150552 30059064 30932874 31113768 31669371 32392416 35002989 35351856 36441468 40003416 40078752 41243832 41485024 41647392 42225828 45088596 46670652 48588624 49263466 51529824 53337888 54991776 56301104 60118128 61865748 62227536 63338742 70005978 70703712 72882936 73895199 80006832 82487664 84451656 90177192 93341304 95008113 97177248 98526932 112602208 120236256 123731496 124455072 126677484 140011956 145765872 147790398 160013664 164975328 168903312 180354384 186682608 190016226 197053864 221685597 247462992 253354968 280023912 291531744 295580796 337806624 360708768 373365216 380032452 394107728 443371194 494925984 506709936 560047824 591161592 665056791 760064904 788215456 886742388 1013419872 1120095648 1182323184 1330113582 1520129808 1773484776 2364646368 2660227164 3040259616 3546969552 5320454328 7093939104 10640908656 21281817312
• Sum of all divisors σ(n): 78769152000
• Sum of proper divisors (its aliquot sum) s(n): 57487334688
• 21281817312 is an abundant number, because the sum of its proper divisors (57487334688) is greater than itself. Its abundance is 36205517376

Bases of 21281817312

• Binary: 10011110100011111101100001011100000₂
• Hexadecimal: 0x4F47EC2E0
• Base-36: 9RYN7C0

Squares and roots of 21281817312

• 21281817312 squared (21281817312²) is 452915748101342905344
• 21281817312 cubed (21281817312³) is 9638870208820590573398316515328
• The square root of 21281817312 is 145882.8890308935
• The cube root of 21281817312 is 2771.2108471161

Scales and comparisons

• 21,281,817,312 seconds is equal to 676 years, 36 weeks, 1 day, 7 hours, 55 minutes, 12 seconds.
• To count from 1 to 21,281,817,312 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 21281817312 cubic inches would be around 230.9 feet tall.

Recreational maths with 21281817312

• 21281817312 backwards is 21371818212
• 21281817312 is a Harshad number.
• The number of decimal digits it has is: 11
• The sum of 21281817312's digits is 36
• More coming soon!