21234690

Names of 21234690

• Cardinal: 21234690 can be written as Twenty-one million, two hundred thirty-four thousand, six hundred ninety.

Scientific notation

• Scientific notation: 2.123469 × 10⁷

Factors of 21234690

• Number of distinct prime factors ω(n): 6
• Total number of prime factors Ω(n): 8
• Sum of prime factors: 143

Divisors of 21234690

• Number of divisors d(n): 128
• Complete list of divisors:
  1 2 3 5 6 9 10 15 18 27 30 31 43 45 54 59 62 86 90 93 118 129 135 155 177 186 215 258 270 279 295 310 354 387 430 465 531 558 590 645 774 837 885 930 1062 1161 1290 1333 1395 1593 1674 1770 1829 1935 2322 2537 2655 2666 2790 3186 3658 3870 3999 4185 5074 5310 5487 5805 6665 7611 7965 7998 8370 9145 10974 11610 11997 12685 13330 15222 15930 16461 18290 19995 22833 23994 25370 27435 32922 35991 38055 39990 45666 49383 54870 59985 68499 71982 76110 78647 82305 98766 114165 119970 136998 157294 164610 179955 228330 235941 246915 342495 359910 393235 471882 493830 684990 707823 786470 1179705 1415646 2123469 2359410 3539115 4246938 7078230 10617345 21234690
• Sum of all divisors σ(n): 60825600
• Sum of proper divisors (its aliquot sum) s(n): 39590910
• 21234690 is an abundant number, because the sum of its proper divisors (39590910) is greater than itself. Its abundance is 18356220

Bases of 21234690

• Binary: 1010001000000010000000010₂
• Hexadecimal: 0x1440402
• Base-36: CN4SI

Squares and roots of 21234690

• 21234690 squared (21234690²) is 450912059396100
• 21234690 cubed (21234690³) is 9574977798537770709000
• The square root of 21234690 is 4608.1113267803
• The cube root of 21234690 is 276.9163775089

Scales and comparisons

• 21,234,690 seconds is equal to 35 weeks, 18 hours, 31 minutes, 30 seconds.
• To count from 1 to 21,234,690 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 21234690 cubic inches would be around 23.1 feet tall.

Recreational maths with 21234690

• 21234690 backwards is 09643212
• 21234690 is a Harshad number.
• The number of decimal digits it has is: 8
• The sum of 21234690's digits is 27
• More coming soon!