18009699138

Names of 18009699138

• Cardinal: 18009699138 can be written as Eighteen billion, nine million, six hundred ninety-nine thousand, one hundred thirty-eight.

Scientific notation

• Scientific notation: 1.8009699138 × 10¹⁰

Factors of 18009699138

• Number of distinct prime factors ω(n): 5
• Total number of prime factors Ω(n): 7
• Sum of prime factors: 10358

Divisors of 18009699138

• Number of divisors d(n): 64
• Complete list of divisors:
  1 2 3 6 9 18 19 27 38 54 57 114 171 342 513 1026 2143 4286 6429 8191 12858 16382 19287 24573 38574 40717 49146 57861 73719 81434 115722 122151 147438 155629 221157 244302 311258 366453 442314 466887 732906 933774 1099359 1400661 2198718 2801322 4201983 8403966 17553313 35106626 52659939 105319878 157979817 315959634 333512947 473939451 667025894 947878902 1000538841 2001077682 3001616523 6003233046 9004849569 18009699138
• Sum of all divisors σ(n): 42152755200
• Sum of proper divisors (its aliquot sum) s(n): 24143056062
• 18009699138 is an abundant number, because the sum of its proper divisors (24143056062) is greater than itself. Its abundance is 6133356924

Bases of 18009699138

• Binary: 10000110001011101100011001101000010₂
• Hexadecimal: 0x431763342
• Base-36: 89UICSI

Squares and roots of 18009699138

• 18009699138 squared (18009699138²) is 324349263041277943044
• 18009699138 cubed (18009699138³) is 5841432643005438629257939896072
• The square root of 18009699138 is 134200.2203351395
• The cube root of 18009699138 is 2621.2120306575

Scales and comparisons

• 18,009,699,138 seconds is equal to 572 years, 33 weeks, 6 days, 14 hours, 12 minutes, 18 seconds.
• To count from 1 to 18,009,699,138 would take you about one thousand, one hundred forty-five 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 18009699138 cubic inches would be around 218.4 feet tall.

Recreational maths with 18009699138

• 18009699138 backwards is 83199690081
• 18009699138 is a Harshad number.
• The number of decimal digits it has is: 11
• The sum of 18009699138's digits is 54
• More coming soon!