21428950818

Names of 21428950818

• Cardinal: 21428950818 can be written as Twenty-one billion, four hundred twenty-eight million, nine hundred fifty thousand, eight hundred eighteen.

Scientific notation

• Scientific notation: 2.1428950818 × 10¹⁰

Factors of 21428950818

• Number of distinct prime factors ω(n): 7
• Total number of prime factors Ω(n): 7
• Sum of prime factors: 928

Divisors of 21428950818

• Number of divisors d(n): 128
• Complete list of divisors:
  1 2 3 6 11 22 31 33 62 66 79 93 158 186 233 237 341 466 474 569 682 699 869 1023 1138 1398 1707 1738 2046 2449 2563 2607 3414 4898 5126 5214 6259 7223 7347 7689 12518 14446 14694 15378 17639 18407 18777 21669 26939 35278 36814 37554 43338 44951 52917 53878 55221 79453 80817 89902 105834 110442 132577 134853 158906 161634 194029 202477 238359 265154 269706 388058 397731 404954 476718 494461 570617 582087 607431 795462 988922 1141234 1164174 1214862 1393481 1458347 1483383 1711851 2786962 2916694 2966766 3423702 4109887 4180443 4375041 6276787 8219774 8360886 8750082 10473583 12329661 12553574 15328291 18830361 20947166 24659322 30656582 31420749 37660722 45208757 45984873 62841498 90417514 91969746 115209413 135626271 230418826 271252542 324681073 345628239 649362146 691256478 974043219 1948086438 3571491803 7142983606 10714475409 21428950818
• Sum of all divisors σ(n): 49169203200
• Sum of proper divisors (its aliquot sum) s(n): 27740252382
• 21428950818 is an abundant number, because the sum of its proper divisors (27740252382) is greater than itself. Its abundance is 6311301564

Bases of 21428950818

• Binary: 10011111101010000111101011100100010₂
• Hexadecimal: 0x4FD43D722
• Base-36: 9UE8S9U

Squares and roots of 21428950818

• 21428950818 squared (21428950818²) is 459199933160262869124
• 21428950818 cubed (21428950818³) is 9840172783320160334409766743432
• The square root of 21428950818 is 146386.3067981429
• The cube root of 21428950818 is 2777.5825134637

Scales and comparisons

• 21,428,950,818 seconds is equal to 681 years, 19 weeks, 3 days, 6 hours, 20 minutes, 18 seconds.
• To count from 1 to 21,428,950,818 would take you about one thousand, three hundred sixty-two 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 21428950818 cubic inches would be around 231.5 feet tall.

Recreational maths with 21428950818

• 21428950818 backwards is 81805982412
• The number of decimal digits it has is: 11
• The sum of 21428950818's digits is 48
• More coming soon!