18681668208

Names of 18681668208

• Cardinal: 18681668208 can be written as Eighteen billion, six hundred eighty-one million, six hundred sixty-eight thousand, two hundred eight.

Scientific notation

• Scientific notation: 1.8681668208 × 10¹⁰

Factors of 18681668208

• Number of distinct prime factors ω(n): 4
• Total number of prime factors Ω(n): 8
• Sum of prime factors: 18533413

Divisors of 18681668208

• Number of divisors d(n): 60
• Complete list of divisors:
  1 2 3 4 6 7 8 9 12 14 16 18 21 24 28 36 42 48 56 63 72 84 112 126 144 168 252 336 504 1008 18533401 37066802 55600203 74133604 111200406 129733807 148267208 166800609 222400812 259467614 296534416 333601218 389201421 444801624 518935228 667202436 778402842 889603248 1037870456 1167604263 1334404872 1556805684 2075740912 2335208526 2668809744 3113611368 4670417052 6227222736 9340834104 18681668208
• Sum of all divisors σ(n): 59751688048
• Sum of proper divisors (its aliquot sum) s(n): 41070019840
• 18681668208 is an abundant number, because the sum of its proper divisors (41070019840) is greater than itself. Its abundance is 22388351632

Bases of 18681668208

• Binary: 10001011001100000111010001001110000₂
• Hexadecimal: 0x45983A270
• Base-36: 8KYKZG0

Squares and roots of 18681668208

• 18681668208 squared (18681668208²) is 349004727033797931264
• 18681668208 cubed (18681668208³) is 6519990513469020953990838054912
• The square root of 18681668208 is 136680.8992068753
• The cube root of 18681668208 is 2653.4152339279

Scales and comparisons

• 18,681,668,208 seconds is equal to 594 years, 1 week, 16 minutes, 48 seconds.
• To count from 1 to 18,681,668,208 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 18681668208 cubic inches would be around 221.1 feet tall.

Recreational maths with 18681668208

• 18681668208 backwards is 80286618681
• The number of decimal digits it has is: 11
• The sum of 18681668208's digits is 54
• More coming soon!