21521488842

Names of 21521488842

• Cardinal: 21521488842 can be written as Twenty-one billion, five hundred twenty-one million, four hundred eighty-eight thousand, eight hundred forty-two.

Scientific notation

• Scientific notation: 2.1521488842 × 10¹⁰

Factors of 21521488842

• Number of distinct prime factors ω(n): 5
• Total number of prime factors Ω(n): 7
• Sum of prime factors: 595194

Divisors of 21521488842

• Number of divisors d(n): 72
• Complete list of divisors:
  1 2 3 6 7 9 14 18 21 41 42 49 63 82 98 123 126 147 246 287 294 369 441 574 738 861 882 1722 2009 2583 4018 5166 6027 12054 18081 36162 595141 1190282 1785423 3570846 4165987 5356269 8331974 10712538 12497961 24400781 24995922 29161909 37493883 48801562 58323818 73202343 74987766 87485727 146404686 170805467 174971454 219607029 262457181 341610934 439214058 512416401 524914362 1024832802 1195638269 1537249203 2391276538 3074498406 3586914807 7173829614 10760744421 21521488842
• Sum of all divisors σ(n): 55566027972
• Sum of proper divisors (its aliquot sum) s(n): 34044539130
• 21521488842 is an abundant number, because the sum of its proper divisors (34044539130) is greater than itself. Its abundance is 12523050288

Bases of 21521488842

• Binary: 10100000010110001111101101111001010₂
• Hexadecimal: 0x502C7DBCA
• Base-36: 9VXC72I

Squares and roots of 21521488842

• 21521488842 squared (21521488842²) is 463174481976330500964
• 21521488842 cubed (21521488842³) is 9968204445752726984600996243688
• The square root of 21521488842 is 146702.0410287465
• The cube root of 21521488842 is 2781.5749767217

Scales and comparisons

• 21,521,488,842 seconds is equal to 684 years, 16 weeks, 3 days, 7 hours, 20 minutes, 42 seconds.
• To count from 1 to 21,521,488,842 would take you about one thousand, three hundred sixty-eight 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 21521488842 cubic inches would be around 231.8 feet tall.

Recreational maths with 21521488842

• 21521488842 backwards is 24888412512
• The number of decimal digits it has is: 11
• The sum of 21521488842's digits is 45
• More coming soon!