21072744

Names of 21072744

• Cardinal: 21072744 can be written as Twenty-one million, seventy-two thousand, seven hundred forty-four.

Scientific notation

• Scientific notation: 2.1072744 × 10⁷

Factors of 21072744

• Number of distinct prime factors ω(n): 5
• Total number of prime factors Ω(n): 10
• Sum of prime factors: 204

Divisors of 21072744

• Number of divisors d(n): 192
• Complete list of divisors:
  1 2 3 4 6 7 8 9 11 12 14 18 21 22 24 27 28 33 36 42 44 49 54 56 63 66 72 77 84 88 98 99 108 126 132 147 154 168 181 189 196 198 216 231 252 264 294 297 308 362 378 392 396 441 462 504 539 543 588 594 616 693 724 756 792 882 924 1078 1086 1176 1188 1267 1323 1386 1448 1512 1617 1629 1764 1848 1991 2079 2156 2172 2376 2534 2646 2772 3234 3258 3528 3801 3982 4158 4312 4344 4851 4887 5068 5292 5544 5973 6468 6516 7602 7964 8316 8869 9702 9774 10136 10584 11403 11946 12936 13032 13937 14553 15204 15928 16632 17738 17919 19404 19548 22806 23892 26607 27874 29106 30408 34209 35476 35838 38808 39096 41811 45612 47784 53214 53757 55748 58212 68418 70952 71676 79821 83622 91224 97559 106428 107514 111496 116424 125433 136836 143352 159642 167244 195118 212856 215028 239463 250866 273672 292677 319284 334488 376299 390236 430056 478926 501732 585354 638568 752598 780472 878031 957852 1003464 1170708 1505196 1756062 1915704 2341416 2634093 3010392 3512124 5268186 7024248 10536372 21072744
• Sum of all divisors σ(n): 74692800
• Sum of proper divisors (its aliquot sum) s(n): 53620056
• 21072744 is an abundant number, because the sum of its proper divisors (53620056) is greater than itself. Its abundance is 32547312

Bases of 21072744

• Binary: 1010000011000101101101000₂
• Hexadecimal: 0x1418B68
• Base-36: CJNU0

Squares and roots of 21072744

• 21072744 squared (21072744²) is 444060539689536
• 21072744 cubed (21072744³) is 9357574073379431606784
• The square root of 21072744 is 4590.5058544783
• The cube root of 21072744 is 276.2106142877

Scales and comparisons

• 21,072,744 seconds is equal to 34 weeks, 5 days, 21 hours, 32 minutes, 24 seconds.
• To count from 1 to 21,072,744 would take you about twenty 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 21072744 cubic inches would be around 23 feet tall.

Recreational maths with 21072744

• 21072744 backwards is 44727012
• 21072744 is a Harshad number.
• The number of decimal digits it has is: 8
• The sum of 21072744's digits is 27
• More coming soon!