21321809184

Names of 21321809184

• Cardinal: 21321809184 can be written as Twenty-one billion, three hundred twenty-one million, eight hundred nine thousand, one hundred eighty-four.

Scientific notation

• Scientific notation: 2.1321809184 × 10¹⁰

Factors of 21321809184

• Number of distinct prime factors ω(n): 4
• Total number of prime factors Ω(n): 8
• Sum of prime factors: 17084801

Divisors of 21321809184

• Number of divisors d(n): 48
• Complete list of divisors:
  1 2 3 4 6 8 12 13 16 24 26 32 39 48 52 78 96 104 156 208 312 416 624 1248 17084783 34169566 51254349 68339132 102508698 136678264 205017396 222102179 273356528 410034792 444204358 546713056 666306537 820069584 888408716 1332613074 1640139168 1776817432 2665226148 3553634864 5330452296 7107269728 10660904592 21321809184
• Sum of all divisors σ(n): 60275117952
• Sum of proper divisors (its aliquot sum) s(n): 38953308768
• 21321809184 is an abundant number, because the sum of its proper divisors (38953308768) is greater than itself. Its abundance is 17631499584

Bases of 21321809184

• Binary: 10011110110111000001111110100100000₂
• Hexadecimal: 0x4F6E0FD20
• Base-36: 9SMGD9C

Squares and roots of 21321809184

• 21321809184 squared (21321809184²) is 454619546878906745856
• 21321809184 cubed (21321809184³) is 9693311229868592389672014741504
• The square root of 21321809184 is 146019.8931104937
• The cube root of 21321809184 is 2772.9456075219

Scales and comparisons

• 21,321,809,184 seconds is equal to 677 years, 50 weeks, 2 days, 4 hours, 46 minutes, 24 seconds.
• To count from 1 to 21,321,809,184 would take you about one thousand, three hundred fifty-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 21321809184 cubic inches would be around 231.1 feet tall.

Recreational maths with 21321809184

• 21321809184 backwards is 48190812312
• 21321809184 is a Harshad number.
• The number of decimal digits it has is: 11
• The sum of 21321809184's digits is 39
• More coming soon!