21438230724

Names of 21438230724

• Cardinal: 21438230724 can be written as Twenty-one billion, four hundred thirty-eight million, two hundred thirty thousand, seven hundred twenty-four.

Scientific notation

• Scientific notation: 2.1438230724 × 10¹⁰

Factors of 21438230724

• Number of distinct prime factors ω(n): 4
• Total number of prime factors Ω(n): 8
• Sum of prime factors: 1089

Divisors of 21438230724

• Number of divisors d(n): 81
• Complete list of divisors:
  1 2 3 4 6 9 12 18 23 36 46 69 92 138 207 276 414 529 828 1058 1061 1587 2116 2122 3174 3183 4244 4761 6348 6366 9522 9549 12732 19044 19098 24403 38196 48806 73209 97612 146418 219627 292836 439254 561269 878508 1122538 1125721 1683807 2245076 2251442 3367614 3377163 4502884 5051421 6735228 6754326 10102842 10131489 13508652 20205684 20262978 25891583 40525956 51783166 77674749 103566332 155349498 233024247 310698996 466048494 595506409 932096988 1191012818 1786519227 2382025636 3573038454 5359557681 7146076908 10719115362 21438230724
• Sum of all divisors σ(n): 56703100909
• Sum of proper divisors (its aliquot sum) s(n): 35264870185
• 21438230724 is an abundant number, because the sum of its proper divisors (35264870185) is greater than itself. Its abundance is 13826639461

Bases of 21438230724

• Binary: 10011111101110100010111000011000100₂
• Hexadecimal: 0x4FDD170C4
• Base-36: 9UJROP0

Squares and roots of 21438230724

• 21438230724 squared (21438230724²) is 459597736575457564176
• 21438230724 cubed (21438230724³) is 9852962316932832896676124943424
• 21438230724 is a perfect square number. Its square root is 146418
• The cube root of 21438230724 is 2777.9834039069

Scales and comparisons

• 21,438,230,724 seconds is equal to 681 years, 34 weeks, 5 days, 16 hours, 5 minutes, 24 seconds.
• To count from 1 to 21,438,230,724 would take you about one thousand, three hundred sixty-three years!

  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 21438230724 cubic inches would be around 231.5 feet tall.

Recreational maths with 21438230724

• 21438230724 backwards is 42703283412
• 21438230724 is a Harshad number.
• The number of decimal digits it has is: 11
• The sum of 21438230724's digits is 36
• More coming soon!