18438712890

Names of 18438712890

• Cardinal: 18438712890 can be written as Eighteen billion, four hundred thirty-eight million, seven hundred twelve thousand, eight hundred ninety.

Scientific notation

• Scientific notation: 1.843871289 × 10¹⁰

Factors of 18438712890

• Number of distinct prime factors ω(n): 8
• Total number of prime factors Ω(n): 9
• Sum of prime factors: 241

Divisors of 18438712890

• Number of divisors d(n): 384
• Complete list of divisors:
  1 2 3 5 6 10 13 15 17 26 30 31 34 39 51 62 65 67 78 85 93 102 103 130 134 155 169 170 186 195 201 206 221 255 309 310 335 338 390 402 403 442 465 507 510 515 527 618 663 670 806 845 871 930 1005 1014 1030 1054 1105 1139 1209 1326 1339 1545 1581 1690 1742 1751 2010 2015 2077 2210 2278 2418 2535 2613 2635 2678 2873 3090 3162 3193 3315 3417 3502 4017 4030 4154 4355 5070 5226 5239 5253 5270 5695 5746 6045 6231 6386 6630 6695 6834 6851 6901 7905 8034 8619 8710 8755 9579 10385 10478 10506 11323 11390 12090 12462 13065 13390 13702 13802 14365 14807 15717 15810 15965 17085 17238 17407 17510 19158 20085 20553 20703 20770 22646 22763 26130 26195 26265 27001 28730 29614 31155 31434 31930 33969 34170 34255 34505 34814 35309 40170 41106 41406 41509 43095 44421 45526 47895 52221 52390 52530 54002 54281 56615 62310 67938 68289 68510 69010 70618 74035 78585 81003 83018 86190 87035 88842 89063 89713 95790 102765 103515 104442 105927 108562 113230 113815 117317 124527 135005 136578 148070 157170 162006 162843 169845 174070 176545 178126 179426 192491 205530 207030 207545 211854 213931 222105 227630 234634 249054 261105 267189 269139 270010 271405 295919 325686 339690 341445 351013 351951 353090 384982 405015 415090 427862 444210 445315 448565 459017 522210 529635 534378 538278 539617 542810 577473 586585 591838 622635 641793 682890 702026 703902 705653 810030 814215 887757 890630 897130 918034 962455 1053039 1059270 1069655 1079234 1154946 1166269 1173170 1245270 1283586 1335945 1345695 1377051 1411306 1479595 1525121 1618851 1628430 1755065 1759755 1775514 1924910 2106078 2116959 2139310 2295085 2332538 2671890 2691390 2698085 2754102 2781103 2887365 2959190 3050242 3208965 3237702 3498807 3510130 3519510 3528265 3636827 4233918 4438785 4575363 4590170 5265195 5396170 5562206 5774730 5831345 5967221 6417930 6885255 6997614 7056530 7273654 7625605 8094255 8343309 8877570 9150726 9173489 10530390 10584795 10910481 11662690 11934442 13770510 13905515 15251210 16188510 16686618 17494035 17901663 18184135 18346978 19826573 21169590 21820962 22876815 27520467 27811030 29836105 34988070 35803326 36154339 36368270 39653146 41716545 45753630 45867445 47278751 54552405 55040934 59479719 59672210 72308678 83433090 89508315 91734890 94557502 99132865 108463017 109104810 118959438 137602335 141836253 179016630 180771695 198265730 216926034 236393755 275204670 283672506 297398595 361543390 472787510 542315085 594797190 614623763 709181265 1084630170 1229247526 1418362530 1843871289 3073118815 3687742578 6146237630 9219356445 18438712890
• Sum of all divisors σ(n): 53672067072
• Sum of proper divisors (its aliquot sum) s(n): 35233354182
• 18438712890 is an abundant number, because the sum of its proper divisors (35233354182) is greater than itself. Its abundance is 16794641292

Bases of 18438712890

• Binary: 10001001011000010000110111000111010₂
• Hexadecimal: 0x44B086E3A
• Base-36: 8GXXLX6

Squares and roots of 18438712890

• 18438712890 squared (18438712890²) is 339986133039852152100
• 18438712890 cubed (18438712890³) is 6268906693703176760620510569000
• The square root of 18438712890 is 135789.2222895471
• The cube root of 18438712890 is 2641.8624412465

Scales and comparisons

• 18,438,712,890 seconds is equal to 586 years, 15 weeks, 2 days, 41 minutes, 30 seconds.
• To count from 1 to 18,438,712,890 would take you about one thousand, one hundred seventy-two 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 18438712890 cubic inches would be around 220.2 feet tall.

Recreational maths with 18438712890

• 18438712890 backwards is 09821783481
• 18438712890 is a Harshad number.
• The number of decimal digits it has is: 11
• The sum of 18438712890's digits is 51
• More coming soon!