18907187145

Names of 18907187145

• Cardinal: 18907187145 can be written as Eighteen billion, nine hundred seven million, one hundred eighty-seven thousand, one hundred forty-five.

Scientific notation

• Scientific notation: 1.8907187145 × 10¹⁰

Factors of 18907187145

• Number of distinct prime factors ω(n): 7
• Total number of prime factors Ω(n): 8
• Sum of prime factors: 865

Divisors of 18907187145

• Number of divisors d(n): 192
• Complete list of divisors:
  1 3 5 7 11 15 21 23 33 35 55 69 77 89 105 115 121 161 165 231 253 267 345 363 385 445 483 605 623 727 759 805 847 979 1155 1265 1335 1771 1815 1869 2047 2181 2415 2541 2783 2937 3115 3635 3795 4235 4895 5089 5313 6141 6853 7997 8349 8855 9345 10235 10769 10905 12705 13915 14329 14685 15267 16721 19481 20559 22517 23991 25445 26565 30705 32307 34265 39985 41745 42987 50163 53845 55979 58443 64703 67551 71645 75383 76335 83605 87967 97405 102795 112585 117047 119955 157619 161535 167937 183931 194109 214935 226149 247687 250815 263901 279895 292215 323515 337755 351141 376915 439835 452921 472857 551793 585235 615769 711733 743061 788095 839685 919655 970545 1130745 1238435 1287517 1319505 1358763 1488169 1733809 1755705 1847307 2023241 2135199 2264605 2364285 2758965 3078845 3558665 3715305 3862551 4464507 4982131 5201427 6069723 6437585 6793815 7440845 7829063 8669045 9236535 10116205 10417183 10675995 14162687 14946393 16369859 19312755 22322535 23487189 24910655 26007135 30348615 31251549 39145315 42488061 49109577 52085915 54803441 70813435 74731965 81849295 114589013 117435945 156257745 164410323 180068449 212440305 245547885 274017205 343767039 540205347 572945065 822051615 900342245 1260479143 1718835195 2701026735 3781437429 6302395715 18907187145
• Sum of all divisors σ(n): 40154849280
• Sum of proper divisors (its aliquot sum) s(n): 21247662135
• 18907187145 is an abundant number, because the sum of its proper divisors (21247662135) is greater than itself. Its abundance is 2340474990

Bases of 18907187145

• Binary: 10001100110111101001100011111001001₂
• Hexadecimal: 0x466F4C7C9
• Base-36: 8OOUMYX

Squares and roots of 18907187145

• 18907187145 squared (18907187145²) is 357481725736053251025
• 18907187145 cubed (18907187145³) is 6758973889409121690815338073625
• The square root of 18907187145 is 137503.4077577715
• The cube root of 18907187145 is 2664.0496076657

Scales and comparisons

• 18,907,187,145 seconds is equal to 601 years, 9 weeks, 6 days, 4 hours, 25 minutes, 45 seconds.
• To count from 1 to 18,907,187,145 would take you about one thousand, two hundred 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 18907187145 cubic inches would be around 222 feet tall.

Recreational maths with 18907187145

• 18907187145 backwards is 54178170981
• The number of decimal digits it has is: 11
• The sum of 18907187145's digits is 51
• More coming soon!