21283720985823921

Names of 21283720985823921

• Cardinal: 21283720985823921 can be written as Twenty-one quadrillion, two hundred eighty-three trillion, seven hundred twenty billion, nine hundred eighty-five million, eight hundred twenty-three thousand, nine hundred twenty-one.

Scientific notation

• Scientific notation: 2.1283720985823921 × 10¹⁶

Factors of 21283720985823921

• Number of distinct prime factors ω(n): 4
• Total number of prime factors Ω(n): 6
• Sum of prime factors: 100505920

Divisors of 21283720985823921

• Number of divisors d(n): 32
• Complete list of divisors:
  1 3 9 27 337 1011 3033 9099 23279 69837 209511 628533 7845023 23535069 70605207 100482301 211815621 301446903 904340709 2713022127 33862535437 101587606311 304762818933 914288456799 2339127484979 7017382454937 21052147364811 63156442094433 788285962437923 2364857887313769 7094573661941307 21283720985823921
• Sum of all divisors σ(n): 31626362432371200
• Sum of proper divisors (its aliquot sum) s(n): 10342641446547279
• 21283720985823921 is a deficient number, because the sum of its proper divisors (10342641446547279) is less than itself. Its deficiency is 10941079539276642

Bases of 21283720985823921

• Binary: 1001011100111010110111001110100110110111100101010110001₂
• Hexadecimal: 0x4B9D6E74DBCAB1
• Base-36: 5TKG6FTKGQ9

Squares and roots of 21283720985823921

• 21283720985823921 squared (21283720985823921²) is 452996779002401579581043215814241
• 21283720985823921 cubed (21283720985823921³) is 9641457051764055423878634712467437740964270258961
• The square root of 21283720985823921 is 145889413.5495236029
• The cube root of 21283720985823921 is 277129.3473585199

Scales and comparisons

• 21,283,720,985,823,921 seconds is equal to 676,756,492 years, 24 weeks, 5 days, 20 hours, 25 minutes, 21 seconds.
• To count from 1 to 21,283,720,985,823,921 would take you about two billion, thirty million, two hundred sixty-nine thousand, four hundred seventy-seven 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 21283720985823921 cubic inches would be around 23094.1 feet tall.

Recreational maths with 21283720985823921

• 21283720985823921 backwards is 12932858902738212
• The number of decimal digits it has is: 17
• The sum of 21283720985823921's digits is 72
• More coming soon!