21478021285638

Names of 21478021285638

• Cardinal: 21478021285638 can be written as Twenty-one trillion, four hundred seventy-eight billion, twenty-one million, two hundred eighty-five thousand, six hundred thirty-eight.

Scientific notation

• Scientific notation: 2.1478021285638 × 10¹³

Factors of 21478021285638

• Number of distinct prime factors ω(n): 5
• Total number of prime factors Ω(n): 5
• Sum of prime factors: 23300088

Divisors of 21478021285638

• Number of divisors d(n): 32
• Complete list of divisors:
  1 2 3 6 37 74 111 222 4153 8306 12459 24918 153661 307322 460983 921966 23295893 46591786 69887679 139775358 861948041 1723896082 2585844123 5171688246 96747843629 193495687258 290243530887 580487061774 3579670214273 7159340428546 10739010642819 21478021285638
• Sum of all divisors σ(n): 44127641516256
• Sum of proper divisors (its aliquot sum) s(n): 22649620230618
• 21478021285638 is an abundant number, because the sum of its proper divisors (22649620230618) is greater than itself. Its abundance is 1171598944980

Bases of 21478021285638

• Binary: 100111000100010111101110101000100011100000110₂
• Hexadecimal: 0x1388BDD44706
• Base-36: 7M2V7BSAU

Squares and roots of 21478021285638

• 21478021285638 squared (21478021285638²) is 461305398346319006385067044
• 21478021285638 cubed (21478021285638³) is 9907927164861956264683472403257704314072
• The square root of 21478021285638 is 4634438.6160179097
• The cube root of 21478021285638 is 27797.0103946729

Scales and comparisons

• 21,478,021,285,638 seconds is equal to 682,934 years, 33 weeks, 2 days, 7 hours, 47 minutes, 18 seconds.
• To count from 1 to 21,478,021,285,638 would take you about one million, seven hundred seven thousand, three hundred thirty-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 21478021285638 cubic inches would be around 2316.4 feet tall.

Recreational maths with 21478021285638

• 21478021285638 backwards is 83658212087412
• The number of decimal digits it has is: 14
• The sum of 21478021285638's digits is 57
• More coming soon!