21369997890

Names of 21369997890

• Cardinal: 21369997890 can be written as Twenty-one billion, three hundred sixty-nine million, nine hundred ninety-seven thousand, eight hundred ninety.

Scientific notation

• Scientific notation: 2.136999789 × 10¹⁰

Factors of 21369997890

• Number of distinct prime factors ω(n): 5
• Total number of prime factors Ω(n): 7
• Sum of prime factors: 1182

Divisors of 21369997890

• Number of divisors d(n): 72
• Complete list of divisors:
  1 2 3 5 6 9 10 15 18 30 45 90 421 751 842 1263 1502 2105 2253 2526 3755 3789 4210 4506 6315 6759 7510 7578 11265 12630 13518 18945 22530 33795 37890 67590 316171 564001 632342 948513 1128002 1580855 1692003 1897026 2820005 2845539 3161710 3384006 4742565 5076009 5640010 5691078 8460015 9485130 10152018 14227695 16920030 25380045 28455390 50760090 237444421 474888842 712333263 1187222105 1424666526 2136999789 2374444210 3561666315 4273999578 7123332630 10684998945 21369997890
• Sum of all divisors σ(n): 55768229244
• Sum of proper divisors (its aliquot sum) s(n): 34398231354
• 21369997890 is an abundant number, because the sum of its proper divisors (34398231354) is greater than itself. Its abundance is 13028233464

Bases of 21369997890

• Binary: 10011111001110000000100101001000010₂
• Hexadecimal: 0x4F9C04A42
• Base-36: 9TF57WI

Squares and roots of 21369997890

• 21369997890 squared (21369997890²) is 456676809818604452100
• 21369997890 cubed (21369997890³) is 9759182462235508424121606069000
• The square root of 21369997890 is 146184.8073159451
• The cube root of 21369997890 is 2775.0330495211

Scales and comparisons

• 21,369,997,890 seconds is equal to 679 years, 25 weeks, 6 days, 22 hours, 31 minutes, 30 seconds.
• To count from 1 to 21,369,997,890 would take you about one thousand, three hundred fifty-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 21369997890 cubic inches would be around 231.3 feet tall.

Recreational maths with 21369997890

• 21369997890 backwards is 09879996312
• The number of decimal digits it has is: 11
• The sum of 21369997890's digits is 63
• More coming soon!