21111090

Names of 21111090

• Cardinal: 21111090 can be written as Twenty-one million, one hundred eleven thousand and ninety.

Scientific notation

• Scientific notation: 2.111109 × 10⁷

Factors of 21111090

• Number of distinct prime factors ω(n): 8
• Total number of prime factors Ω(n): 8
• Sum of prime factors: 97

Divisors of 21111090

• Number of divisors d(n): 256
• Complete list of divisors:
  1 2 3 5 6 7 10 11 13 14 15 19 21 22 26 30 33 35 37 38 39 42 55 57 65 66 70 74 77 78 91 95 105 110 111 114 130 133 143 154 165 182 185 190 195 209 210 222 231 247 259 266 273 285 286 330 370 385 390 399 407 418 429 455 462 481 494 518 546 555 570 627 665 703 715 741 770 777 798 814 858 910 962 1001 1045 1110 1155 1221 1235 1254 1295 1330 1365 1406 1430 1443 1463 1482 1554 1729 1995 2002 2035 2090 2109 2145 2310 2405 2442 2470 2590 2717 2730 2849 2886 2926 3003 3135 3367 3458 3515 3705 3885 3990 4070 4218 4290 4389 4810 4921 5005 5187 5291 5434 5698 6006 6105 6270 6734 7030 7215 7315 7410 7733 7770 8151 8547 8645 8778 9139 9842 10010 10101 10374 10545 10582 12210 13585 14245 14430 14630 14763 15015 15466 15873 16302 16835 17094 17290 18278 19019 20202 21090 21945 23199 24605 25935 26455 27170 27417 28490 29526 30030 31746 33670 37037 38038 38665 40755 42735 43890 45695 46398 49210 50505 51870 52910 54131 54834 57057 63973 73815 74074 77330 79365 81510 85470 91390 95095 100529 101010 108262 111111 114114 115995 127946 137085 147630 158730 162393 185185 190190 191919 201058 222222 231990 270655 274170 285285 301587 319865 324786 370370 383838 502645 541310 555555 570570 603174 639730 703703 811965 959595 1005290 1111110 1407406 1507935 1623930 1919190 2111109 3015870 3518515 4222218 7037030 10555545 21111090
• Sum of all divisors σ(n): 73543680
• Sum of proper divisors (its aliquot sum) s(n): 52432590
• 21111090 is an abundant number, because the sum of its proper divisors (52432590) is greater than itself. Its abundance is 31321500

Bases of 21111090

• Binary: 1010000100010000100110010₂
• Hexadecimal: 0x1422132
• Base-36: CKHF6

Squares and roots of 21111090

• 21111090 squared (21111090²) is 445678120988100
• 21111090 cubed (21111090³) is 9408750923210668029000
• The square root of 21111090 is 4594.6806200213
• The cube root of 21111090 is 276.3780526023

Scales and comparisons

• 21,111,090 seconds is equal to 34 weeks, 6 days, 8 hours, 11 minutes, 30 seconds.
• To count from 1 to 21,111,090 would take you about two 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 21111090 cubic inches would be around 23 feet tall.

Recreational maths with 21111090

• 21111090 backwards is 09011112
• 21111090 is a Harshad number.
• The number of decimal digits it has is: 8
• The sum of 21111090's digits is 15
• More coming soon!