21071441728

Names of 21071441728

• Cardinal: 21071441728 can be written as Twenty-one billion, seventy-one million, four hundred forty-one thousand, seven hundred twenty-eight.

Scientific notation

• Scientific notation: 2.1071441728 × 10¹⁰

Factors of 21071441728

• Number of distinct prime factors ω(n): 4
• Total number of prime factors Ω(n): 10
• Sum of prime factors: 415

Divisors of 21071441728

• Number of divisors d(n): 84
• Complete list of divisors:
  1 2 4 8 16 32 64 127 137 149 254 274 298 508 548 596 1016 1096 1192 2032 2192 2384 4064 4384 4768 8128 8768 9536 16129 17399 18923 20413 32258 34798 37846 40826 64516 69596 75692 81652 129032 139192 151384 163304 258064 278384 302768 326608 516128 556768 605536 653216 1032256 1113536 1211072 1306432 2209673 2403221 2592451 4419346 4806442 5184902 8838692 9612884 10369804 17677384 19225768 20739608 35354768 38451536 41479216 70709536 76903072 82958432 141419072 153806144 165916864 329241277 658482554 1316965108 2633930216 5267860432 10535720864 21071441728
• Sum of all divisors σ(n): 42738027300
• Sum of proper divisors (its aliquot sum) s(n): 21666585572
• 21071441728 is an abundant number, because the sum of its proper divisors (21666585572) is greater than itself. Its abundance is 595143844

Bases of 21071441728

• Binary: 10011100111111101001010111101000000₂
• Hexadecimal: 0x4E7F4AF40
• Base-36: 9OHE4HS

Squares and roots of 21071441728

• 21071441728 squared (21071441728²) is 444005656496499625984
• 21071441728 cubed (21071441728³) is 9355839317768376504895650660352
• The square root of 21071441728 is 145160.0555524831
• The cube root of 21071441728 is 2762.0492433479

Scales and comparisons

• 21,071,441,728 seconds is equal to 670 years, 2 days, 10 hours, 15 minutes, 28 seconds.
• To count from 1 to 21,071,441,728 would take you about one thousand, three hundred forty 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 21071441728 cubic inches would be around 230.2 feet tall.

Recreational maths with 21071441728

• 21071441728 backwards is 82714417012
• The number of decimal digits it has is: 11
• The sum of 21071441728's digits is 37
• More coming soon!