21278720848

Names of 21278720848

• Cardinal: 21278720848 can be written as Twenty-one billion, two hundred seventy-eight million, seven hundred twenty thousand, eight hundred forty-eight.

Scientific notation

• Scientific notation: 2.1278720848 × 10¹⁰

Factors of 21278720848

• Number of distinct prime factors ω(n): 5
• Total number of prime factors Ω(n): 8
• Sum of prime factors: 750986

Divisors of 21278720848

• Number of divisors d(n): 80
• Complete list of divisors:
  1 2 4 7 8 11 14 16 22 23 28 44 46 56 77 88 92 112 154 161 176 184 253 308 322 368 506 616 644 1012 1232 1288 1771 2024 2576 3542 4048 7084 14168 28336 750943 1501886 3003772 5256601 6007544 8260373 10513202 12015088 16520746 17271689 21026404 33041492 34543378 42052808 57822611 66082984 69086756 84105616 115645222 120901823 132165968 138173512 189988579 231290444 241803646 276347024 379977158 462580888 483607292 759954316 925161776 967214584 1329920053 1519908632 1934429168 2659840106 3039817264 5319680212 10639360424 21278720848
• Sum of all divisors σ(n): 53635424256
• Sum of proper divisors (its aliquot sum) s(n): 32356703408
• 21278720848 is an abundant number, because the sum of its proper divisors (32356703408) is greater than itself. Its abundance is 11077982560

Bases of 21278720848

• Binary: 10011110100010011111000001101010000₂
• Hexadecimal: 0x4F44F8350
• Base-36: 9RWSU34

Squares and roots of 21278720848

• 21278720848 squared (21278720848²) is 452783960927109839104
• 21278720848 cubed (21278720848³) is 9634663509019709541728210440192
• The square root of 21278720848 is 145872.2758031833
• The cube root of 21278720848 is 2771.0764386255

Scales and comparisons

• 21,278,720,848 seconds is equal to 676 years, 31 weeks, 11 hours, 47 minutes, 28 seconds.
• To count from 1 to 21,278,720,848 would take you about one thousand, three 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 21278720848 cubic inches would be around 230.9 feet tall.

Recreational maths with 21278720848

• 21278720848 backwards is 84802787212
• The number of decimal digits it has is: 11
• The sum of 21278720848's digits is 49
• More coming soon!