21149310

Names of 21149310

• Cardinal: 21149310 can be written as Twenty-one million, one hundred forty-nine thousand, three hundred ten.

Scientific notation

• Scientific notation: 2.114931 × 10⁷

Factors of 21149310

• Number of distinct prime factors ω(n): 7
• Total number of prime factors Ω(n): 7
• Sum of prime factors: 218

Divisors of 21149310

• Number of divisors d(n): 128
• Complete list of divisors:
  1 2 3 5 6 7 10 13 14 15 21 26 30 35 39 42 61 65 70 78 91 105 122 127 130 182 183 195 210 254 273 305 366 381 390 427 455 546 610 635 762 793 854 889 910 915 1270 1281 1365 1586 1651 1778 1830 1905 2135 2379 2562 2667 2730 3302 3810 3965 4270 4445 4758 4953 5334 5551 6405 7747 7930 8255 8890 9906 11102 11557 11895 12810 13335 15494 16510 16653 23114 23241 23790 24765 26670 27755 33306 34671 38735 46482 49530 54229 55510 57785 69342 77470 83265 100711 108458 115570 116205 162687 166530 173355 201422 232410 271145 302133 325374 346710 503555 542290 604266 704977 813435 1007110 1409954 1510665 1626870 2114931 3021330 3524885 4229862 7049770 10574655 21149310
• Sum of all divisors σ(n): 63995904
• Sum of proper divisors (its aliquot sum) s(n): 42846594
• 21149310 is an abundant number, because the sum of its proper divisors (42846594) is greater than itself. Its abundance is 21697284

Bases of 21149310

• Binary: 1010000101011011001111110₂
• Hexadecimal: 0x142B67E
• Base-36: CLAWU

Squares and roots of 21149310

• 21149310 squared (21149310²) is 447293313476100
• 21149310 cubed (21149310³) is 9459944947633216491000
• The square root of 21149310 is 4598.8378966867
• The cube root of 21149310 is 276.5447391001

Scales and comparisons

• 21,149,310 seconds is equal to 34 weeks, 6 days, 18 hours, 48 minutes, 30 seconds.
• To count from 1 to 21,149,310 would take you about three 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 21149310 cubic inches would be around 23 feet tall.

Recreational maths with 21149310

• 21149310 backwards is 01394112
• 21149310 is a Harshad number.
• The number of decimal digits it has is: 8
• The sum of 21149310's digits is 21
• More coming soon!