18690509990

Names of 18690509990

• Cardinal: 18690509990 can be written as Eighteen billion, six hundred ninety million, five hundred nine thousand, nine hundred ninety.

Scientific notation

• Scientific notation: 1.869050999 × 10¹⁰

Factors of 18690509990

• Number of distinct prime factors ω(n): 6
• Total number of prime factors Ω(n): 6
• Sum of prime factors: 1281

Divisors of 18690509990

• Number of divisors d(n): 64
• Complete list of divisors:
  1 2 5 10 97 127 173 194 254 346 485 635 865 877 970 1270 1730 1754 4385 8770 12319 16781 21971 24638 33562 43942 61595 83905 85069 109855 111379 123190 151721 167810 170138 219710 222758 303442 425345 556895 758605 850690 1113790 1517210 2131187 4262374 10655935 10803763 14716937 19268567 21311870 21607526 29433874 38537134 54018815 73584685 96342835 108037630 147169370 192685670 1869050999 3738101998 9345254995 18690509990
• Sum of all divisors σ(n): 34494695424
• Sum of proper divisors (its aliquot sum) s(n): 15804185434
• 18690509990 is a deficient number, because the sum of its proper divisors (15804185434) is less than itself. Its deficiency is 2886324556

Bases of 18690509990

• Binary: 10001011010000010101000110010100110₂
• Hexadecimal: 0x45A0A8CA6
• Base-36: 8L3UHT2

Squares and roots of 18690509990

• 18690509990 squared (18690509990²) is 349335163686289800100
• 18690509990 cubed (18690509990³) is 6529252366736884734804152999000
• The square root of 18690509990 is 136713.2399952543
• The cube root of 18690509990 is 2653.8337764713

Scales and comparisons

• 18,690,509,990 seconds is equal to 594 years, 15 weeks, 4 days, 8 hours, 19 minutes, 50 seconds.
• To count from 1 to 18,690,509,990 would take you about one thousand, one hundred eighty-eight 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 18690509990 cubic inches would be around 221.2 feet tall.

Recreational maths with 18690509990

• 18690509990 backwards is 09990509681
• The number of decimal digits it has is: 11
• The sum of 18690509990's digits is 56
• More coming soon!