18187460421

Names of 18187460421

• Cardinal: 18187460421 can be written as Eighteen billion, one hundred eighty-seven million, four hundred sixty thousand, four hundred twenty-one.

Scientific notation

• Scientific notation: 1.8187460421 × 10¹⁰

Factors of 18187460421

• Number of distinct prime factors ω(n): 6
• Total number of prime factors Ω(n): 8
• Sum of prime factors: 238

Divisors of 18187460421

• Number of divisors d(n): 144
• Complete list of divisors:
  1 3 13 17 19 39 47 51 57 139 141 169 221 247 289 323 417 507 611 663 741 799 867 893 969 1807 1833 2363 2397 2641 2679 2873 3211 3757 4199 5421 5491 6533 7089 7923 7943 8619 9633 10387 11271 11609 12597 13583 15181 16473 19599 23491 23829 30719 31161 34333 34827 40171 40749 44897 45543 48841 54587 70473 71383 84929 92157 102999 111061 120513 124127 134691 135031 146523 150917 163761 176579 197353 214149 254787 258077 333183 372381 399347 405093 446329 452751 522223 529737 583661 592059 763249 774231 927979 1104077 1198041 1338987 1443793 1566669 1613651 1750983 1888037 2110159 2289747 2295527 2565589 2783937 3312231 3355001 4331379 4840953 5664111 6330477 6788899 6886581 7587593 7696767 9922237 10065003 18769309 20366697 20977463 22762779 24544481 27432067 29766711 35872703 43615013 56307927 62932389 73633443 82296201 107618109 128989081 130845039 319078253 356616871 386967243 466345139 957234759 1069850613 1399035417 6062486807 18187460421
• Sum of all divisors σ(n): 30202905600
• Sum of proper divisors (its aliquot sum) s(n): 12015445179
• 18187460421 is a deficient number, because the sum of its proper divisors (12015445179) is less than itself. Its deficiency is 6172015242

Bases of 18187460421

• Binary: 10000111100000011101001111101000101₂
• Hexadecimal: 0x43C0E9F45
• Base-36: 8CSCE9X

Squares and roots of 18187460421

• 18187460421 squared (18187460421²) is 330783716565441497241
• 18187460421 cubed (18187460421³) is 6016115752945249287461668198461
• The square root of 18187460421 is 134860.8928525983
• The cube root of 18187460421 is 2629.8078681563

Scales and comparisons

• 18,187,460,421 seconds is equal to 578 years, 15 weeks, 6 days, 20 minutes, 21 seconds.
• To count from 1 to 18,187,460,421 would take you about one thousand, one hundred fifty-six 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 18187460421 cubic inches would be around 219.2 feet tall.

Recreational maths with 18187460421

• 18187460421 backwards is 12406478181
• The number of decimal digits it has is: 11
• The sum of 18187460421's digits is 42
• More coming soon!