21246940

Names of 21246940

• Cardinal: 21246940 can be written as Twenty-one million, two hundred forty-six thousand, nine hundred forty.

Scientific notation

• Scientific notation: 2.124694 × 10⁷

Factors of 21246940

• Number of distinct prime factors ω(n): 7
• Total number of prime factors Ω(n): 8
• Sum of prime factors: 90

Divisors of 21246940

• Number of divisors d(n): 192
• Complete list of divisors:
  1 2 4 5 10 11 13 17 19 20 22 23 26 34 38 44 46 52 55 65 68 76 85 92 95 110 115 130 143 170 187 190 209 220 221 230 247 253 260 286 299 323 340 374 380 391 418 437 442 460 494 506 572 598 646 715 748 782 836 874 884 935 988 1012 1045 1105 1196 1235 1265 1292 1430 1495 1564 1615 1748 1870 1955 2090 2185 2210 2431 2470 2530 2717 2860 2990 3230 3289 3553 3740 3910 4180 4199 4301 4370 4420 4807 4862 4940 5060 5083 5434 5681 5980 6460 6578 7106 7429 7820 8398 8602 8740 9614 9724 10166 10868 11362 12155 13156 13585 14212 14858 16445 16796 17204 17765 19228 20332 20995 21505 22724 24035 24310 25415 27170 28405 29716 32890 35530 37145 41990 43010 46189 48070 48620 50830 54340 55913 56810 62491 65780 71060 74290 81719 83980 86020 92378 96140 96577 101660 111826 113620 124982 148580 163438 184756 193154 223652 230945 249964 279565 312455 326876 386308 408595 461890 482885 559130 624910 817190 923780 965770 1062347 1118260 1249820 1634380 1931540 2124694 4249388 5311735 10623470 21246940
• Sum of all divisors σ(n): 60963840
• Sum of proper divisors (its aliquot sum) s(n): 39716900
• 21246940 is an abundant number, because the sum of its proper divisors (39716900) is greater than itself. Its abundance is 18469960

Bases of 21246940

• Binary: 1010001000011001111011100₂
• Hexadecimal: 0x14433DC
• Base-36: CNE8S

Squares and roots of 21246940

• 21246940 squared (21246940²) is 451432459363600
• 21246940 cubed (21246940³) is 9591558378150847384000
• The square root of 21246940 is 4609.4403130965
• The cube root of 21246940 is 276.9696170197

Scales and comparisons

• 21,246,940 seconds is equal to 35 weeks, 21 hours, 55 minutes, 40 seconds.
• To count from 1 to 21,246,940 would take you about four 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 21246940 cubic inches would be around 23.1 feet tall.

Recreational maths with 21246940

• 21246940 backwards is 04964212
• The number of decimal digits it has is: 8
• The sum of 21246940's digits is 28
• More coming soon!