21842730

Names of 21842730

• Cardinal: 21842730 can be written as Twenty-one million, eight hundred forty-two thousand, seven hundred thirty.

Scientific notation

• Scientific notation: 2.184273 × 10⁷

Factors of 21842730

• Number of distinct prime factors ω(n): 6
• Total number of prime factors Ω(n): 9
• Sum of prime factors: 157

Divisors of 21842730

• Number of divisors d(n): 192
• Complete list of divisors:
  1 2 3 5 6 7 9 10 13 14 15 18 21 26 27 30 35 39 42 45 49 54 63 65 70 78 90 91 98 105 117 126 127 130 135 147 182 189 195 210 234 245 254 270 273 294 315 351 378 381 390 441 455 490 546 585 630 635 637 702 735 762 819 882 889 910 945 1143 1170 1270 1274 1323 1365 1470 1638 1651 1755 1778 1890 1905 1911 2205 2286 2457 2646 2667 2730 3185 3302 3429 3510 3810 3822 4095 4410 4445 4914 4953 5334 5715 5733 6223 6370 6615 6858 8001 8190 8255 8890 9555 9906 11430 11466 11557 12285 12446 13230 13335 14859 16002 16510 17145 17199 18669 19110 23114 24003 24570 24765 26670 28665 29718 31115 34290 34398 34671 37338 40005 44577 48006 49530 56007 57330 57785 62230 69342 74295 80010 80899 85995 89154 93345 104013 112014 115570 120015 148590 161798 168021 171990 173355 186690 208026 222885 240030 242697 280035 312039 336042 346710 404495 445770 485394 520065 560070 624078 728091 808990 840105 1040130 1213485 1456182 1560195 1680210 2184273 2426970 3120390 3640455 4368546 7280910 10921365 21842730
• Sum of all divisors σ(n): 73543680
• Sum of proper divisors (its aliquot sum) s(n): 51700950
• 21842730 is an abundant number, because the sum of its proper divisors (51700950) is greater than itself. Its abundance is 29858220

Bases of 21842730

• Binary: 1010011010100101100101010₂
• Hexadecimal: 0x14D4B2A
• Base-36: D05YI

Squares and roots of 21842730

• 21842730 squared (21842730²) is 477104853852900
• 21842730 cubed (21842730³) is 10421272504398354417000
• The square root of 21842730 is 4673.6206521283
• The cube root of 21842730 is 279.5346436791

Scales and comparisons

• 21,842,730 seconds is equal to 36 weeks, 19 hours, 25 minutes, 30 seconds.
• To count from 1 to 21,842,730 would take you about two weeks!

  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 21842730 cubic inches would be around 23.3 feet tall.

Recreational maths with 21842730

• 21842730 backwards is 03724812
• 21842730 is a Harshad number.
• The number of decimal digits it has is: 8
• The sum of 21842730's digits is 27
• More coming soon!