21000168

Names of 21000168

• Cardinal: 21000168 can be written as Twenty-one million, one hundred sixty-eight.

Scientific notation

• Scientific notation: 2.1000168 × 10⁷

Factors of 21000168

• Number of distinct prime factors ω(n): 6
• Total number of prime factors Ω(n): 10
• Sum of prime factors: 91

Divisors of 21000168

• Number of divisors d(n): 256
• Complete list of divisors:
  1 2 3 4 6 7 8 9 12 14 17 18 19 21 24 27 28 34 36 38 42 43 51 54 56 57 63 68 72 76 84 86 102 108 114 119 126 129 133 136 152 153 168 171 172 189 204 216 228 238 252 258 266 301 306 323 342 344 357 378 387 399 408 456 459 476 504 513 516 532 602 612 646 684 714 731 756 774 798 817 903 918 952 969 1026 1032 1064 1071 1161 1197 1204 1224 1292 1368 1428 1462 1512 1548 1596 1634 1806 1836 1938 2052 2142 2193 2261 2322 2394 2408 2451 2584 2709 2856 2907 2924 3096 3192 3213 3268 3591 3612 3672 3876 4104 4284 4386 4522 4644 4788 4902 5117 5418 5719 5814 5848 6426 6536 6579 6783 7182 7224 7353 7752 8127 8568 8721 8772 9044 9288 9576 9804 10234 10836 11438 11628 12852 13158 13566 13889 14364 14706 15351 16254 17157 17442 17544 18088 19608 19737 20349 20468 21672 22059 22876 23256 25704 26316 27132 27778 28728 29412 30702 32508 34314 34884 39474 40698 40936 41667 44118 45752 46053 51471 52632 54264 55556 58824 61047 61404 65016 68628 69768 78948 81396 83334 88236 92106 97223 102942 111112 122094 122808 125001 137256 138159 154413 157896 162792 166668 176472 184212 194446 205884 244188 250002 276318 291669 308826 333336 368424 375003 388892 411768 488376 500004 552636 583338 617652 750006 777784 875007 1000008 1105272 1166676 1235304 1500012 1750014 2333352 2625021 3000024 3500028 5250042 7000056 10500084 21000168
• Sum of all divisors σ(n): 76032000
• Sum of proper divisors (its aliquot sum) s(n): 55031832
• 21000168 is an abundant number, because the sum of its proper divisors (55031832) is greater than itself. Its abundance is 34031664

Bases of 21000168

• Binary: 1010000000110111111101000₂
• Hexadecimal: 0x1406FE8
• Base-36: CI3U0

Squares and roots of 21000168

• 21000168 squared (21000168²) is 441007056028224
• 21000168 cubed (21000168³) is 9261222265778116741632
• The square root of 21000168 is 4582.5940252219
• The cube root of 21000168 is 275.8931533493

Scales and comparisons

• 21,000,168 seconds is equal to 34 weeks, 5 days, 1 hour, 22 minutes, 48 seconds.
• To count from 1 to 21,000,168 would take you about fourteen hours!

  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 21000168 cubic inches would be around 23 feet tall.

Recreational maths with 21000168

• 21000168 backwards is 86100012
• 21000168 is a Harshad number.
• The number of decimal digits it has is: 8
• The sum of 21000168's digits is 18
• More coming soon!