21438422985

Names of 21438422985

• Cardinal: 21438422985 can be written as Twenty-one billion, four hundred thirty-eight million, four hundred twenty-two thousand, nine hundred eighty-five.

Scientific notation

• Scientific notation: 2.1438422985 × 10¹⁰

Factors of 21438422985

• Number of distinct prime factors ω(n): 6
• Total number of prime factors Ω(n): 7
• Sum of prime factors: 14342

Divisors of 21438422985

• Number of divisors d(n): 96
• Complete list of divisors:
  1 3 5 7 15 17 21 29 35 51 85 87 105 119 145 203 255 357 435 493 595 609 841 1015 1479 1785 2465 2523 3045 3451 4205 5887 7395 10353 12615 14281 14297 17255 17661 29435 42843 42891 51765 71405 71485 88305 99967 100079 214215 214455 242777 299901 300237 414149 499835 500395 728331 1213885 1242447 1499505 1501185 1699439 2070745 2899043 3641655 5098317 6212235 7040533 8497195 8697129 12010321 14495215 21121599 25491585 35202665 36030963 43485645 49283731 60051605 84072247 105607995 147851193 180154815 204175457 246418655 252216741 420361235 612526371 739255965 1020877285 1261083705 1429228199 3062631855 4287684597 7146140995 21438422985
• Sum of all divisors σ(n): 42991333632
• Sum of proper divisors (its aliquot sum) s(n): 21552910647
• 21438422985 is an abundant number, because the sum of its proper divisors (21552910647) is greater than itself. Its abundance is 114487662

Bases of 21438422985

• Binary: 10011111101110101000101111111001001₂
• Hexadecimal: 0x4FDD45FC9
• Base-36: 9UJVT1L

Squares and roots of 21438422985

• 21438422985 squared (21438422985²) is 459605980083776310225
• 21438422985 cubed (21438422985³) is 9853227407471482274726130521625
• The square root of 21438422985 is 146418.6565469033
• The cube root of 21438422985 is 2777.9917083275

Scales and comparisons

• 21,438,422,985 seconds is equal to 681 years, 35 weeks, 21 hours, 29 minutes, 45 seconds.
• To count from 1 to 21,438,422,985 would take you about one thousand, three hundred sixty-three 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 21438422985 cubic inches would be around 231.5 feet tall.

Recreational maths with 21438422985

• 21438422985 backwards is 58922483412
• The number of decimal digits it has is: 11
• The sum of 21438422985's digits is 48
• More coming soon!