21728306816

Names of 21728306816

• Cardinal: 21728306816 can be written as Twenty-one billion, seven hundred twenty-eight million, three hundred six thousand, eight hundred sixteen.

Scientific notation

• Scientific notation: 2.1728306816 × 10¹⁰

Factors of 21728306816

• Number of distinct prime factors ω(n): 4
• Total number of prime factors Ω(n): 11
• Sum of prime factors: 3131

Divisors of 21728306816

• Number of divisors d(n): 96
• Complete list of divisors:
  1 2 4 8 16 23 32 46 64 92 107 128 184 214 368 428 529 736 856 1058 1472 1712 2116 2461 2944 2999 3424 4232 4922 5998 6848 8464 9844 11996 13696 16928 19688 23992 33856 39376 47984 56603 67712 68977 78752 95968 113206 137954 157504 191936 226412 275908 315008 320893 383872 452824 551816 641786 905648 1103632 1283572 1586471 1811296 2207264 2567144 3172942 3622592 4414528 5134288 6345884 7245184 7380539 8829056 10268576 12691768 14761078 20537152 25383536 29522156 41074304 50767072 59044312 101534144 118088624 169752397 203068288 236177248 339504794 472354496 679009588 944708992 1358019176 2716038352 5432076704 10864153408 21728306816
• Sum of all divisors σ(n): 45688860000
• Sum of proper divisors (its aliquot sum) s(n): 23960553184
• 21728306816 is an abundant number, because the sum of its proper divisors (23960553184) is greater than itself. Its abundance is 2232246368

Bases of 21728306816

• Binary: 10100001111000110111010011010000000₂
• Hexadecimal: 0x50F1BA680
• Base-36: 9ZCH0U8

Squares and roots of 21728306816

• 21728306816 squared (21728306816²) is 472119317090232057856
• 21728306816 cubed (21728306816³) is 10258353375496954509734231146496
• The square root of 21728306816 is 147405.2469079713
• The cube root of 21728306816 is 2790.4567460071

Scales and comparisons

• 21,728,306,816 seconds is equal to 690 years, 46 weeks, 3 days, 46 minutes, 56 seconds.
• To count from 1 to 21,728,306,816 would take you about one thousand, three hundred eighty-one 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 21728306816 cubic inches would be around 232.5 feet tall.

Recreational maths with 21728306816

• 21728306816 backwards is 61860382712
• The number of decimal digits it has is: 11
• The sum of 21728306816's digits is 44
• More coming soon!