18721550442

Names of 18721550442

• Cardinal: 18721550442 can be written as Eighteen billion, seven hundred twenty-one million, five hundred fifty thousand, four hundred forty-two.

Scientific notation

• Scientific notation: 1.8721550442 × 10¹⁰

Factors of 18721550442

• Number of distinct prime factors ω(n): 7
• Total number of prime factors Ω(n): 9
• Sum of prime factors: 176

Divisors of 18721550442

• Number of divisors d(n): 288
• Complete list of divisors:
  1 2 3 6 7 14 21 23 31 42 43 46 49 62 67 69 86 93 98 129 134 138 147 161 186 201 217 258 294 301 322 402 434 469 483 602 651 713 903 938 961 966 989 1127 1302 1333 1407 1426 1519 1541 1806 1922 1978 2077 2107 2139 2254 2666 2814 2881 2883 2967 3038 3082 3283 3381 3999 4154 4214 4278 4557 4623 4991 5762 5766 5934 6231 6321 6566 6727 6762 6923 7998 8643 9114 9246 9331 9849 9982 10787 12462 12642 13454 13846 14539 14973 17286 18662 19698 20167 20181 20769 21574 22103 27993 29078 29946 30659 32361 34937 40334 40362 41323 41538 43617 44206 47089 47771 48461 55986 60501 61318 64387 64722 65317 66263 66309 69874 75509 82646 87234 89311 91977 94178 95542 96922 101773 104811 121002 123969 128774 130634 132526 132618 141169 141267 143313 145383 151018 154721 178622 183954 193161 195951 198789 203546 209622 214613 226527 247938 267933 282338 282534 286626 289261 290766 305319 309442 334397 386322 391902 397578 423507 429226 450709 453054 463841 464163 535866 578522 610638 625177 643839 668794 847014 867783 901418 927682 928326 950429 1003191 1083047 1250354 1287678 1352127 1391523 1480901 1502291 1735566 1875531 1900858 2006382 2024827 2054153 2166094 2340779 2704254 2768641 2783046 2851287 2961802 3004582 3154963 3246887 3249141 3751062 4049654 4108306 4376239 4442703 4506873 4681558 5537282 5702574 6074481 6162459 6309926 6493774 6498282 6653003 7022337 8305923 8752478 8885406 9013746 9464889 9740661 10366307 12148962 12324918 13128717 13306006 14044674 14379071 16611846 18929778 19380487 19481322 19959009 20732614 26257434 28758142 31098921 38760974 39918018 43137213 46571021 58141461 62197842 63678743 72564149 86274426 93142042 100653497 116282922 127357486 135663409 139713063 145128298 191036229 201306994 217692447 271326818 279426126 301960491 382072458 406990227 435384894 445751201 603920982 813980454 891502402 1337253603 2674507206 3120258407 6240516814 9360775221 18721550442
• Sum of all divisors σ(n): 48772855296
• Sum of proper divisors (its aliquot sum) s(n): 30051304854
• 18721550442 is an abundant number, because the sum of its proper divisors (30051304854) is greater than itself. Its abundance is 11329754412

Bases of 18721550442

• Binary: 10001011011111001000011000001101010₂
• Hexadecimal: 0x45BE4306A
• Base-36: 8LMBSRU

Squares and roots of 18721550442

• 18721550442 squared (18721550442²) is 350496450952350395364
• 18721550442 cubed (18721550442³) is 6561836986246406865265768950888
• The square root of 18721550442 is 136826.7168428739
• The cube root of 18721550442 is 2655.3020909555

Scales and comparisons

• 18,721,550,442 seconds is equal to 595 years, 14 weeks, 6 days, 14 hours, 40 minutes, 42 seconds.
• To count from 1 to 18,721,550,442 would take you about one thousand, one hundred ninety 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 18721550442 cubic inches would be around 221.3 feet tall.

Recreational maths with 18721550442

• 18721550442 backwards is 24405512781
• The number of decimal digits it has is: 11
• The sum of 18721550442's digits is 39
• More coming soon!