18139691817

Names of 18139691817

• Cardinal: 18139691817 can be written as Eighteen billion, one hundred thirty-nine million, six hundred ninety-one thousand, eight hundred seventeen.

Scientific notation

• Scientific notation: 1.8139691817 × 10¹⁰

Factors of 18139691817

• Number of distinct prime factors ω(n): 6
• Total number of prime factors Ω(n): 7
• Sum of prime factors: 1128

Divisors of 18139691817

• Number of divisors d(n): 96
• Complete list of divisors:
  1 3 9 13 37 39 61 73 111 117 183 219 333 481 549 657 793 941 949 1443 2257 2379 2701 2823 2847 4329 4453 6771 7137 8103 8469 8541 12233 13359 20313 24309 29341 34817 35113 36699 40077 57401 57889 68693 88023 104451 105339 110097 164761 172203 173667 206079 264069 313353 316017 452621 494283 516609 521001 618237 746213 893009 1357863 1482849 2123837 2141893 2238639 2541641 2679027 4073589 4190273 6371511 6425679 6715917 7624923 8037081 12570819 19114533 19277037 22874769 27609881 33041333 37712457 54473549 82829643 99123999 155040101 163420647 248488929 297371997 465120303 490261941 1395360909 2015521313 6046563939 18139691817
• Sum of all divisors σ(n): 29890232736
• Sum of proper divisors (its aliquot sum) s(n): 11750540919
• 18139691817 is a deficient number, because the sum of its proper divisors (11750540919) is less than itself. Its deficiency is 6389150898

Bases of 18139691817

• Binary: 10000111001001101011011101100101001₂
• Hexadecimal: 0x43935BB29
• Base-36: 8BZWJS9

Squares and roots of 18139691817

• 18139691817 squared (18139691817²) is 329048419215736761489
• 18139691817 cubed (18139691817³) is 5968836917444485690008094035513
• The square root of 18139691817 is 134683.6731641961
• The cube root of 18139691817 is 2627.5034894061

Scales and comparisons

• 18,139,691,817 seconds is equal to 576 years, 40 weeks, 6 days, 3 hours, 16 minutes, 57 seconds.
• To count from 1 to 18,139,691,817 would take you about one thousand, one hundred fifty-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 18139691817 cubic inches would be around 219 feet tall.

Recreational maths with 18139691817

• 18139691817 backwards is 71819693181
• The number of decimal digits it has is: 11
• The sum of 18139691817's digits is 54
• More coming soon!