21318570

Names of 21318570

• Cardinal: 21318570 can be written as Twenty-one million, three hundred eighteen thousand, five hundred seventy.

Scientific notation

• Scientific notation: 2.131857 × 10⁷

Factors of 21318570

• Number of distinct prime factors ω(n): 7
• Total number of prime factors Ω(n): 8
• Sum of prime factors: 186

Divisors of 21318570

• Number of divisors d(n): 192
• Complete list of divisors:
  1 2 3 5 6 7 9 10 13 14 15 18 19 21 26 30 35 38 39 42 45 57 63 65 70 78 90 91 95 105 114 117 126 130 133 137 171 182 190 195 210 234 247 266 273 274 285 315 342 390 399 411 455 494 546 570 585 630 665 685 741 798 819 822 855 910 959 1170 1197 1233 1235 1330 1365 1370 1482 1638 1710 1729 1781 1918 1995 2055 2223 2394 2466 2470 2603 2730 2877 3458 3562 3705 3990 4095 4110 4446 4795 5187 5206 5343 5754 5985 6165 7410 7809 8190 8631 8645 8905 9590 10374 10686 11115 11970 12330 12467 13015 14385 15561 15618 16029 17262 17290 17810 18221 22230 23427 24934 25935 26030 26715 28770 31122 32058 33839 36442 37401 39045 43155 46854 51870 53430 54663 62335 67678 74802 77805 78090 80145 86310 91105 101517 109326 112203 117135 124670 155610 160290 163989 169195 182210 187005 203034 224406 234270 236873 273315 304551 327978 338390 374010 473746 507585 546630 561015 609102 710619 819945 1015170 1122030 1184365 1421238 1522755 1639890 2131857 2368730 3045510 3553095 4263714 7106190 10659285 21318570
• Sum of all divisors σ(n): 72334080
• Sum of proper divisors (its aliquot sum) s(n): 51015510
• 21318570 is an abundant number, because the sum of its proper divisors (51015510) is greater than itself. Its abundance is 29696940

Bases of 21318570

• Binary: 1010001010100101110101010₂
• Hexadecimal: 0x1454BAA
• Base-36: COXII

Squares and roots of 21318570

• 21318570 squared (21318570²) is 454481426844900
• 21318570 cubed (21318570³) is 9688894111892879793000
• The square root of 21318570 is 4617.2036992101
• The cube root of 21318570 is 277.2805179539

Scales and comparisons

• 21,318,570 seconds is equal to 35 weeks, 1 day, 17 hours, 49 minutes, 30 seconds.
• To count from 1 to 21,318,570 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 21318570 cubic inches would be around 23.1 feet tall.

Recreational maths with 21318570

• 21318570 backwards is 07581312
• The number of decimal digits it has is: 8
• The sum of 21318570's digits is 27
• More coming soon!