21218916411615

Names of 21218916411615

• Cardinal: 21218916411615 can be written as Twenty-one trillion, two hundred eighteen billion, nine hundred sixteen million, four hundred eleven thousand, six hundred fifteen.

Scientific notation

• Scientific notation: 2.1218916411615 × 10¹³

Factors of 21218916411615

• Number of distinct prime factors ω(n): 6
• Total number of prime factors Ω(n): 6
• Sum of prime factors: 3820360

Divisors of 21218916411615

• Number of divisors d(n): 64
• Complete list of divisors:
  1 3 5 13 15 39 61 65 183 195 305 467 793 915 1401 2335 2379 3965 6071 7005 11895 18213 28487 30355 85461 91065 142435 370331 427305 1110993 1851655 3819811 5554965 11459433 19099055 49657543 57297165 148972629 233008471 248287715 699025413 744863145 1165042355 1783851737 3029110123 3495127065 5351555211 8919258685 9087330369 15145550615 23190072581 26757776055 45436651845 69570217743 108814955957 115950362905 326444867871 347851088715 544074779785 1414594427441 1632224339355 4243783282323 7072972137205 21218916411615
• Sum of all divisors σ(n): 37240783437312
• Sum of proper divisors (its aliquot sum) s(n): 16021867025697
• 21218916411615 is a deficient number, because the sum of its proper divisors (16021867025697) is less than itself. Its deficiency is 5197049385918

Bases of 21218916411615

• Binary: 100110100110001101001111110011010100011011111₂
• Hexadecimal: 0x134C69F9A8DF
• Base-36: 7IRU2Z3Z3

Squares and roots of 21218916411615

• 21218916411615 squared (21218916411615²) is 450242413683104388106908225
• 21218916411615 cubed (21218916411615³) is 9553656140905573738642897356609129033375
• The square root of 21218916411615 is 4606399.5062971905
• The cube root of 21218916411615 is 27684.7794026803

Scales and comparisons

• 21,218,916,411,615 seconds is equal to 674,695 years, 47 weeks, 1 day, 7 hours, 40 minutes, 15 seconds.
• To count from 1 to 21,218,916,411,615 would take you about one million, six hundred eighty-six thousand, seven hundred thirty-nine 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 21218916411615 cubic inches would be around 2307.1 feet tall.

Recreational maths with 21218916411615

• 21218916411615 backwards is 51611461981212
• The number of decimal digits it has is: 14
• The sum of 21218916411615's digits is 48
• More coming soon!