18997396388

Names of 18997396388

• Cardinal: 18997396388 can be written as Eighteen billion, nine hundred ninety-seven million, three hundred ninety-six thousand, three hundred eighty-eight.

Scientific notation

• Scientific notation: 1.8997396388 × 10¹⁰

Factors of 18997396388

• Number of distinct prime factors ω(n): 6
• Total number of prime factors Ω(n): 7
• Sum of prime factors: 919

Divisors of 18997396388

• Number of divisors d(n): 96
• Complete list of divisors:
  1 2 4 23 43 46 79 86 89 92 158 172 178 316 356 683 989 1366 1817 1978 2047 2732 3397 3634 3827 3956 4094 6794 7031 7268 7654 8188 13588 14062 15308 15709 28124 29369 31418 53957 58738 60787 62836 78131 88021 107914 117476 121574 156262 161713 176042 215828 243148 302333 312524 323426 352084 604666 646852 675487 1209332 1241011 1350974 1398101 2320151 2482022 2613841 2701948 2796202 4640302 4802173 4964044 5227682 5592404 6953659 9280604 9604346 10455364 13907318 19208692 27814636 53363473 60118343 106726946 110449979 120236686 206493439 213453892 220899958 240473372 412986878 441799916 825973756 4749349097 9498698194 18997396388
• Sum of all divisors σ(n): 36404121600
• Sum of proper divisors (its aliquot sum) s(n): 17406725212
• 18997396388 is a deficient number, because the sum of its proper divisors (17406725212) is less than itself. Its deficiency is 1590671176

Bases of 18997396388

• Binary: 10001101100010101010100001110100100₂
• Hexadecimal: 0x46C5543A4
• Base-36: 8Q6K4V8

Squares and roots of 18997396388

• 18997396388 squared (18997396388²) is 360901069522795446544
• 18997396388 cubed (18997396388³) is 6856180674577691099837832683072
• The square root of 18997396388 is 137831.0429039845
• The cube root of 18997396388 is 2668.2797574953

Scales and comparisons

• 18,997,396,388 seconds is equal to 604 years, 3 weeks, 6 hours, 33 minutes, 8 seconds.
• To count from 1 to 18,997,396,388 would take you about one thousand, two hundred 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 18997396388 cubic inches would be around 222.4 feet tall.

Recreational maths with 18997396388

• 18997396388 backwards is 88369379981
• The number of decimal digits it has is: 11
• The sum of 18997396388's digits is 71
• More coming soon!