18919890090

Names of 18919890090

• Cardinal: 18919890090 can be written as Eighteen billion, nine hundred nineteen million, eight hundred ninety thousand and ninety.

Scientific notation

• Scientific notation: 1.891989009 × 10¹⁰

Factors of 18919890090

• Number of distinct prime factors ω(n): 4
• Total number of prime factors Ω(n): 14
• Sum of prime factors: 189

Divisors of 18919890090

• Number of divisors d(n): 132
• Complete list of divisors:
  1 2 3 5 6 9 10 15 18 27 30 45 54 81 90 135 162 179 243 270 358 405 486 537 729 810 895 1074 1215 1458 1611 1790 2187 2430 2685 3222 3645 4374 4833 5370 6561 7290 8055 9666 10935 13122 14499 16110 19683 21870 24165 28998 32041 32805 39366 43497 48330 59049 64082 65610 72495 86994 96123 98415 118098 130491 144990 160205 192246 196830 217485 260982 288369 295245 320410 391473 434970 480615 576738 590490 652455 782946 865107 961230 1174419 1304910 1441845 1730214 1957365 2348838 2595321 2883690 3523257 3914730 4325535 5190642 5872095 7046514 7785963 8651070 10569771 11744190 12976605 15571926 17616285 21139542 23357889 25953210 35232570 38929815 46715778 52848855 70073667 77859630 105697710 116789445 140147334 210221001 233578890 350368335 420442002 630663003 700736670 1051105005 1261326006 1891989009 2102210010 3153315015 3783978018 6306630030 9459945045 18919890090
• Sum of all divisors σ(n): 51370391394
• Sum of proper divisors (its aliquot sum) s(n): 32450501304
• 18919890090 is an abundant number, because the sum of its proper divisors (32450501304) is greater than itself. Its abundance is 13530611214

Bases of 18919890090

• Binary: 10001100111101101101001110010101010₂
• Hexadecimal: 0x467B69CAA
• Base-36: 8OWEWMI

Squares and roots of 18919890090

• 18919890090 squared (18919890090²) is 357962241017680208100
• 18919890090 cubed (18919890090³) is 6772606256424599284020327729000
• The square root of 18919890090 is 137549.5913843439
• The cube root of 18919890090 is 2664.6460951171

Scales and comparisons

• 18,919,890,090 seconds is equal to 601 years, 30 weeks, 6 days, 5 hours, 1 minute, 30 seconds.
• To count from 1 to 18,919,890,090 would take you about one thousand, two hundred 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 18919890090 cubic inches would be around 222.1 feet tall.

Recreational maths with 18919890090

• 18919890090 backwards is 09009891981
• 18919890090 is a Harshad number.
• The number of decimal digits it has is: 11
• The sum of 18919890090's digits is 54
• More coming soon!