21351330

Names of 21351330

• Cardinal: 21351330 can be written as Twenty-one million, three hundred fifty-one thousand, three hundred thirty.

Scientific notation

• Scientific notation: 2.135133 × 10⁷

Factors of 21351330

• Number of distinct prime factors ω(n): 7
• Total number of prime factors Ω(n): 9
• Sum of prime factors: 120

Divisors of 21351330

• Number of divisors d(n): 256
• Complete list of divisors:
  1 2 3 5 6 7 9 10 11 13 14 15 18 21 22 26 27 30 33 35 39 42 45 54 55 63 65 66 70 77 78 79 90 91 99 105 110 117 126 130 135 143 154 158 165 182 189 195 198 210 231 234 237 270 273 286 297 315 330 351 378 385 390 395 429 455 462 474 495 546 553 585 594 630 693 702 711 715 770 790 819 858 869 910 945 990 1001 1027 1106 1155 1170 1185 1287 1365 1386 1422 1430 1485 1638 1659 1738 1755 1890 2002 2054 2079 2133 2145 2310 2370 2457 2574 2607 2730 2765 2970 3003 3081 3318 3465 3510 3555 3861 4095 4158 4266 4290 4345 4914 4977 5005 5135 5214 5530 6006 6083 6162 6435 6930 7110 7189 7722 7821 8190 8295 8690 9009 9243 9954 10010 10270 10395 10665 11297 12166 12285 12870 13035 14378 14931 15015 15405 15642 16590 18018 18249 18486 19305 20790 21330 21567 22594 23463 24570 24885 26070 27027 27729 29862 30030 30415 30810 33891 35945 36498 38610 39105 43134 45045 46215 46926 49770 54054 54747 55458 56485 60830 64701 67782 71890 74655 78210 79079 90090 91245 92430 101673 107835 109494 112970 117315 129402 135135 138645 149310 158158 164241 169455 182490 194103 203346 215670 234630 237237 270270 273735 277290 305019 323505 328482 338910 388206 395395 474474 508365 547470 610038 647010 711711 790790 821205 970515 1016730 1186185 1423422 1525095 1642410 1941030 2135133 2372370 3050190 3558555 4270266 7117110 10675665 21351330
• Sum of all divisors σ(n): 77414400
• Sum of proper divisors (its aliquot sum) s(n): 56063070
• 21351330 is an abundant number, because the sum of its proper divisors (56063070) is greater than itself. Its abundance is 34711740

Bases of 21351330

• Binary: 1010001011100101110100010₂
• Hexadecimal: 0x145CBA2
• Base-36: CPMSI

Squares and roots of 21351330

• 21351330 squared (21351330²) is 455879292768900
• 21351330 cubed (21351330³) is 9733629220075397637000
• The square root of 21351330 is 4620.7499391333
• The cube root of 21351330 is 277.4224765185

Scales and comparisons

• 21,351,330 seconds is equal to 35 weeks, 2 days, 2 hours, 55 minutes, 30 seconds.
• To count from 1 to 21,351,330 would take you about six days!

  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 21351330 cubic inches would be around 23.1 feet tall.

Recreational maths with 21351330

• 21351330 backwards is 03315312
• 21351330 is a Harshad number.
• The number of decimal digits it has is: 8
• The sum of 21351330's digits is 18
• More coming soon!