18129121640

Names of 18129121640

• Cardinal: 18129121640 can be written as Eighteen billion, one hundred twenty-nine million, one hundred twenty-one thousand, six hundred forty.

Scientific notation

• Scientific notation: 1.812912164 × 10¹⁰

Factors of 18129121640

• Number of distinct prime factors ω(n): 7
• Total number of prime factors Ω(n): 9
• Sum of prime factors: 3948

Divisors of 18129121640

• Number of divisors d(n): 256
• Complete list of divisors:
  1 2 4 5 7 8 10 14 17 20 23 28 34 35 40 43 46 56 68 70 85 86 92 115 119 136 140 161 170 172 184 215 230 238 280 301 322 340 344 391 430 460 476 595 602 644 680 731 782 805 860 920 952 989 1190 1204 1288 1462 1505 1564 1610 1720 1955 1978 2380 2408 2737 2924 3010 3128 3220 3655 3851 3910 3956 4760 4945 5117 5474 5848 6020 6440 6923 7310 7702 7820 7912 9890 10234 10948 12040 13685 13846 14620 15404 15640 16813 19255 19780 20468 21896 25585 26957 27370 27692 29240 30808 33626 34615 38510 39560 40936 51170 53914 54740 55384 65467 67252 69230 77020 84065 88573 102340 107828 109480 117691 130934 134504 134785 138460 154040 165593 168130 177146 204680 215656 235382 261868 269570 276920 327335 331186 336260 354292 442865 458269 470764 523736 539140 588455 620011 654670 662372 672520 708584 827965 885730 916538 941528 1078280 1159151 1176910 1240022 1309340 1324744 1505741 1655930 1771460 1833076 2291345 2318302 2353820 2480044 2618680 2815081 3011482 3100055 3311860 3542920 3666152 3808639 4582690 4636604 4707640 4960088 5630162 5795755 6022964 6200110 6623720 7528705 7617278 9165380 9273208 10540187 11260324 11591510 12045928 12400220 14075405 15057410 15234556 18330760 19043195 19705567 21080374 22520648 23183020 24800440 26660473 28150810 30114820 30469112 38086390 39411134 42160748 46366040 52700935 53320946 56301620 60229640 64746863 76172780 78822268 84321496 98527835 105401870 106641892 112603240 129493726 133302365 152345560 157644536 197055670 210803740 213283784 258987452 266604730 323734315 394111340 421607480 453228041 517974904 533209460 647468630 788222680 906456082 1066418920 1294937260 1812912164 2266140205 2589874520 3625824328 4532280410 9064560820 18129121640
• Sum of all divisors σ(n): 52717547520
• Sum of proper divisors (its aliquot sum) s(n): 34588425880
• 18129121640 is an abundant number, because the sum of its proper divisors (34588425880) is greater than itself. Its abundance is 16459304240

Bases of 18129121640

• Binary: 10000111000100101000111000101101000₂
• Hexadecimal: 0x438947168
• Base-36: 8BTLZS8

Squares and roots of 18129121640

• 18129121640 squared (18129121640²) is 328665051437916289600
• 18129121640 cubed (18129121640³) is 5958408696334841322295866944000
• The square root of 18129121640 is 134644.4266949063
• The cube root of 18129121640 is 2626.9930328607

Scales and comparisons

• 18,129,121,640 seconds is equal to 576 years, 23 weeks, 2 days, 19 hours, 7 minutes, 20 seconds.
• To count from 1 to 18,129,121,640 would take you about one thousand, one hundred fifty-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 18129121640 cubic inches would be around 218.9 feet tall.

Recreational maths with 18129121640

• 18129121640 backwards is 04612192181
• 18129121640 is a Harshad number.
• The number of decimal digits it has is: 11
• The sum of 18129121640's digits is 35
• More coming soon!