21491404156242

Names of 21491404156242

• Cardinal: 21491404156242 can be written as Twenty-one trillion, four hundred ninety-one billion, four hundred four million, one hundred fifty-six thousand, two hundred forty-two.

Scientific notation

• Scientific notation: 2.1491404156242 × 10¹³

Factors of 21491404156242

• Number of distinct prime factors ω(n): 5
• Total number of prime factors Ω(n): 6
• Sum of prime factors: 20242220

Divisors of 21491404156242

• Number of divisors d(n): 48
• Complete list of divisors:
  1 2 3 6 9 18 61 122 183 366 549 967 1098 1934 2901 5802 8703 17406 58987 117974 176961 353922 530883 1061766 20241187 40482374 60723561 121447122 182170683 364341366 1234712407 2469424814 3704137221 7408274442 11112411663 19573227829 22224823326 39146455658 58719683487 117439366974 176159050461 352318100922 1193966897569 2387933795138 3581900692707 7163801385414 10745702078121 21491404156242
• Sum of all divisors σ(n): 47377010421312
• Sum of proper divisors (its aliquot sum) s(n): 25885606265070
• 21491404156242 is an abundant number, because the sum of its proper divisors (25885606265070) is greater than itself. Its abundance is 4394202108828

Bases of 21491404156242

• Binary: 100111000101111011011100000101010110101010010₂
• Hexadecimal: 0x138BDB82AD52
• Base-36: 7M90J55CI

Squares and roots of 21491404156242

• 21491404156242 squared (21491404156242²) is 461880452606935911947562564
• 21491404156242 cubed (21491404156242³) is 9926459478843638561986374632710926124488
• The square root of 21491404156242 is 4635882.2414123075
• The cube root of 21491404156242 is 27802.7825985829

Scales and comparisons

• 21,491,404,156,242 seconds is equal to 683,360 years, 9 weeks, 15 hours, 50 minutes, 42 seconds.
• To count from 1 to 21,491,404,156,242 would take you about one million, seven hundred eight thousand, four hundred 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 21491404156242 cubic inches would be around 2316.9 feet tall.

Recreational maths with 21491404156242

• 21491404156242 backwards is 24265140419412
• The number of decimal digits it has is: 14
• The sum of 21491404156242's digits is 45
• More coming soon!