18109891499960727818

Names of 18109891499960727818

• Cardinal: 18109891499960727818 can be written as Eighteen quintillion, one hundred nine quadrillion, eight hundred ninety-one trillion, four hundred ninety-nine billion, nine hundred sixty million, seven hundred twenty-seven thousand, eight hundred eighteen.

Scientific notation

• Scientific notation: 1.8109891499960727818 × 10¹⁹

Factors of 18109891499960727818

• Number of distinct prime factors ω(n): 3
• Total number of prime factors Ω(n): 3
• Sum of prime factors: 696534288460028008

Divisors of 18109891499960727818

• Number of divisors d(n): 8
• Complete list of divisors:
  1 2 13 26 696534288460027993 1393068576920055986 9054945749980363909 18109891499960727818
• Sum of all divisors σ(n): 29254440115321175748
• Sum of proper divisors (its aliquot sum) s(n): 11144548615360447930
• 18109891499960727818 is a deficient number, because the sum of its proper divisors (11144548615360447930) is less than itself. Its deficiency is 6965342884600279888

Bases of 18109891499960727818

• Binary: 1111101101010011010000100101111001110000000001100111100100001010₂
• Hexadecimal: 0xFB53425E7006790A
• Base-36: 3TL98RA3YGKCQ

Squares and roots of 18109891499960727818

• 18109891499960727818 squared (18109891499960727818²) is 327968170140349820090025036304279041124
• 18109891499960727818 cubed (18109891499960727818³) is 5939467976682394988206914856075811700869379792118192787432
• The square root of 18109891499960727818 is 4255571818.2120634747
• The cube root of 18109891499960727818 is 2626063.8590288929

Scales and comparisons

• 18,109,891,499,960,727,818 seconds is equal to 293,274,701,009 years, 3 weeks, 3 days, 15 hours, 30 minutes, 7 seconds.
• To count from 1 to 18,109,891,499,960,727,818 would take you about two hundred ninety-three billion, two hundred seventy-four million, seven hundred one thousand and nine 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 18109891499960727818 cubic inches would be around 218838.7 feet tall.

Recreational maths with 18109891499960727818

• 18109891499960727818 backwards is 81872706999419890181
• The number of decimal digits it has is: 20
• The sum of 18109891499960727818's digits is 107
• More coming soon!