21217868091618

Names of 21217868091618

• Cardinal: 21217868091618 can be written as Twenty-one trillion, two hundred seventeen billion, eight hundred sixty-eight million, ninety-one thousand, six hundred eighteen.

Scientific notation

• Scientific notation: 2.1217868091618 × 10¹³

Factors of 21217868091618

• Number of distinct prime factors ω(n): 6
• Total number of prime factors Ω(n): 6
• Sum of prime factors: 561071

Divisors of 21217868091618

• Number of divisors d(n): 64
• Complete list of divisors:
  1 2 3 6 11 22 33 66 71 142 213 426 781 1562 2343 4686 8191 16382 24573 49146 90101 180202 270303 540606 552793 581561 1105586 1163122 1658379 1744683 3316758 3489366 6080723 6397171 12161446 12794342 18242169 19191513 36484338 38383026 39248303 78496606 117744909 235489818 431731333 863462666 1295193999 2590387998 4527927463 9055854926 13583782389 27167564778 49807202093 99614404186 149421606279 298843212558 321482849873 642965699746 964448549619 1928897099238 3536311348603 7072622697206 10608934045809 21217868091618
• Sum of all divisors σ(n): 46951368228864
• Sum of proper divisors (its aliquot sum) s(n): 25733500137246
• 21217868091618 is an abundant number, because the sum of its proper divisors (25733500137246) is greater than itself. Its abundance is 4515632045628

Bases of 21217868091618

• Binary: 100110100110000101011011111011001000011100010₂
• Hexadecimal: 0x134C2B7D90E2
• Base-36: 7IRCQTZ36

Squares and roots of 21217868091618

• 21217868091618 squared (21217868091618²) is 450197926353301269241857924
• 21217868091618 cubed (21217868091618³) is 9552240216484301311642957191586571281032
• The square root of 21217868091618 is 4606285.7153695969
• The cube root of 21217868091618 is 27684.3234732437

Scales and comparisons

• 21,217,868,091,618 seconds is equal to 674,662 years, 29 weeks, 5 days, 23 hours, 40 minutes, 18 seconds.
• To count from 1 to 21,217,868,091,618 would take you about one million, six hundred eighty-six thousand, six hundred fifty-six 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 21217868091618 cubic inches would be around 2307 feet tall.

Recreational maths with 21217868091618

• 21217868091618 backwards is 81619086871212
• The number of decimal digits it has is: 14
• The sum of 21217868091618's digits is 60
• More coming soon!