21012011904

Names of 21012011904

• Cardinal: 21012011904 can be written as Twenty-one billion, twelve million, eleven thousand, nine hundred four.

Scientific notation

• Scientific notation: 2.1012011904 × 10¹⁰

Factors of 21012011904

• Number of distinct prime factors ω(n): 5
• Total number of prime factors Ω(n): 12
• Sum of prime factors: 324

Divisors of 21012011904

• Number of divisors d(n): 192
• Complete list of divisors:
  1 2 3 4 6 8 12 13 16 24 26 32 39 48 52 64 78 96 104 113 128 156 192 193 208 226 312 339 384 386 416 452 579 624 678 772 832 904 1158 1248 1356 1469 1544 1664 1808 2316 2496 2509 2712 2938 3088 3616 4407 4632 4992 5018 5424 5876 6176 7232 7527 8814 9264 10036 10848 11752 12352 14464 15054 17628 18528 20072 21696 21809 23504 24704 30108 35256 37056 37249 40144 43392 43618 47008 60216 65427 70512 74112 74498 80288 87236 94016 111747 120432 130854 141024 148996 160576 174472 188032 223494 240864 261708 282048 283517 297992 321152 348944 446988 481728 484237 523416 564096 567034 595984 697888 850551 893976 963456 968474 1046832 1134068 1191968 1395776 1452711 1701102 1787952 1936948 2093664 2268136 2383936 2791552 2905422 3402204 3575904 3873896 4187328 4209137 4536272 4767872 5810844 6804408 7151808 7747792 8374656 8418274 9072544 11621688 12627411 13608816 14303616 15495584 16836548 18145088 23243376 25254822 27217632 30991168 33673096 36290176 46486752 50509644 54435264 54718781 61982336 67346192 92973504 101019288 108870528 109437562 134692384 164156343 185947008 202038576 218875124 269384768 328312686 404077152 437750248 538769536 656625372 808154304 875500496 1313250744 1616308608 1751000992 2626501488 3502001984 5253002976 7004003968 10506005952 21012011904
• Sum of all divisors σ(n): 60954208560
• Sum of proper divisors (its aliquot sum) s(n): 39942196656
• 21012011904 is an abundant number, because the sum of its proper divisors (39942196656) is greater than itself. Its abundance is 18930184752

Bases of 21012011904

• Binary: 10011100100011010011101101110000000₂
• Hexadecimal: 0x4E469DB80
• Base-36: 9NI0C5C

Squares and roots of 21012011904

• 21012011904 squared (21012011904²) is 441504644253837705216
• 21012011904 cubed (21012011904³) is 9276900840732923059682634891264
• The square root of 21012011904 is 144955.2065432629
• The cube root of 21012011904 is 2759.4501067895

Scales and comparisons

• 21,012,011,904 seconds is equal to 668 years, 6 weeks, 13 hours, 58 minutes, 24 seconds.
• To count from 1 to 21,012,011,904 would take you about one thousand, three hundred thirty-six 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 21012011904 cubic inches would be around 230 feet tall.

Recreational maths with 21012011904

• 21012011904 backwards is 40911021012
• The number of decimal digits it has is: 11
• The sum of 21012011904's digits is 21
• More coming soon!