21231997668

Names of 21231997668

• Cardinal: 21231997668 can be written as Twenty-one billion, two hundred thirty-one million, nine hundred ninety-seven thousand, six hundred sixty-eight.

Scientific notation

• Scientific notation: 2.1231997668 × 10¹⁰

Factors of 21231997668

• Number of distinct prime factors ω(n): 5
• Total number of prime factors Ω(n): 10
• Sum of prime factors: 24710

Divisors of 21231997668

• Number of divisors d(n): 144
• Complete list of divisors:
  1 2 3 4 6 7 9 12 14 18 21 27 28 36 42 54 63 81 84 108 126 127 162 189 243 252 254 324 378 381 486 508 567 756 762 889 972 1134 1143 1524 1701 1778 2268 2286 2667 3402 3429 3556 4572 5334 6804 6858 8001 10287 10668 13716 16002 20574 24003 24571 30861 32004 41148 48006 49142 61722 72009 73713 96012 98284 123444 144018 147426 171997 216027 221139 288036 294852 343994 432054 442278 515991 663417 687988 864108 884556 1031982 1326834 1547973 1990251 2063964 2653668 3095946 3120517 3980502 4643919 5970753 6191892 6241034 7961004 9287838 9361551 11941506 12482068 13931757 18575676 18723102 21843619 23883012 27863514 28084653 37446204 41795271 43687238 55727028 56169306 65530857 83590542 84253959 87374476 112338612 131061714 167181084 168507918 196592571 252761877 262123428 337015836 393185142 505523754 589777713 758285631 786370284 1011047508 1179555426 1516571262 1769333139 2359110852 3033142524 3538666278 5307999417 7077332556 10615998834 21231997668
• Sum of all divisors σ(n): 64112082944
• Sum of proper divisors (its aliquot sum) s(n): 42880085276
• 21231997668 is an abundant number, because the sum of its proper divisors (42880085276) is greater than itself. Its abundance is 21648087608

Bases of 21231997668

• Binary: 10011110001100001101001001011100100₂
• Hexadecimal: 0x4F18692E4
• Base-36: 9R4ZE90

Squares and roots of 21231997668

• 21231997668 squared (21231997668²) is 450797724973957438224
• 21231997668 cubed (21231997668³) is 9571336245386769689103222061632
• The square root of 21231997668 is 145712.0367986119
• The cube root of 21231997668 is 2769.0467366739

Scales and comparisons

• 21,231,997,668 seconds is equal to 675 years, 5 weeks, 5 days, 17 hours, 7 minutes, 48 seconds.
• To count from 1 to 21,231,997,668 would take you about one thousand, three hundred fifty 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 21231997668 cubic inches would be around 230.8 feet tall.

Recreational maths with 21231997668

• 21231997668 backwards is 86679913212
• 21231997668 is a Harshad number.
• The number of decimal digits it has is: 11
• The sum of 21231997668's digits is 54
• More coming soon!