21399302928

Names of 21399302928

• Cardinal: 21399302928 can be written as Twenty-one billion, three hundred ninety-nine million, three hundred two thousand, nine hundred twenty-eight.

Scientific notation

• Scientific notation: 2.1399302928 × 10¹⁰

Factors of 21399302928

• Number of distinct prime factors ω(n): 5
• Total number of prime factors Ω(n): 9
• Sum of prime factors: 658

Divisors of 21399302928

• Number of divisors d(n): 120
• Complete list of divisors:
  1 2 3 4 6 8 12 16 24 48 73 146 219 269 292 311 438 538 584 622 807 876 933 1076 1168 1244 1614 1752 1866 2152 2488 3228 3504 3732 4304 4976 5329 6456 7464 10658 12912 14928 15987 19637 21316 22703 31974 39274 42632 45406 58911 63948 68109 78548 83659 85264 90812 117822 127896 136218 157096 167318 181624 235644 250977 255792 272436 314192 334636 363248 471288 501954 544872 669272 942576 1003908 1089744 1338544 1433501 1657319 2007816 2867002 3314638 4015632 4300503 4971957 5734004 6107107 6629276 8601006 9943914 11468008 12214214 13258552 17202012 18321321 19887828 22936016 24428428 26517104 34404024 36642642 39775656 48856856 68808048 73285284 79551312 97713712 146570568 293141136 445818811 891637622 1337456433 1783275244 2674912866 3566550488 5349825732 7133100976 10699651464 21399302928
• Sum of all divisors σ(n): 56438441280
• Sum of proper divisors (its aliquot sum) s(n): 35039138352
• 21399302928 is an abundant number, because the sum of its proper divisors (35039138352) is greater than itself. Its abundance is 13639835424

Bases of 21399302928

• Binary: 10011111011011111110111001100010000₂
• Hexadecimal: 0x4FB7F7310
• Base-36: 9TWLBTC

Squares and roots of 21399302928

• 21399302928 squared (21399302928²) is 457930165804309373184
• 21399302928 cubed (21399302928³) is 9799386337915683044594215882752
• The square root of 21399302928 is 146285.0058208289
• The cube root of 21399302928 is 2776.3009533169

Scales and comparisons

• 21,399,302,928 seconds is equal to 680 years, 22 weeks, 3 days, 2 hours, 48 minutes, 48 seconds.
• To count from 1 to 21,399,302,928 would take you about one thousand, three hundred sixty 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 21399302928 cubic inches would be around 231.4 feet tall.

Recreational maths with 21399302928

• 21399302928 backwards is 82920399312
• 21399302928 is a Harshad number.
• The number of decimal digits it has is: 11
• The sum of 21399302928's digits is 48
• More coming soon!