21091435718872464

Names of 21091435718872464

• Cardinal: 21091435718872464 can be written as Twenty-one quadrillion, ninety-one trillion, four hundred thirty-five billion, seven hundred eighteen million, eight hundred seventy-two thousand, four hundred sixty-four.

Scientific notation

• Scientific notation: 2.1091435718872464 × 10¹⁶

Factors of 21091435718872464

• Number of distinct prime factors ω(n): 4
• Total number of prime factors Ω(n): 10
• Sum of prime factors: 1100235

Divisors of 21091435718872464

• Number of divisors d(n): 135
• Complete list of divisors:
  1 2 3 4 6 8 9 11 12 16 18 22 24 33 36 44 48 66 72 88 99 121 132 144 176 198 242 264 363 396 484 528 726 792 968 1089 1452 1584 1936 2178 2904 4356 5808 8712 17424 1100219 2200438 3300657 4400876 6601314 8801752 9901971 12102409 13202628 17603504 19803942 24204818 26405256 36307227 39607884 48409636 52810512 72614454 79215768 96819272 108921681 133126499 145228908 158431536 193638544 217843362 266252998 290457816 399379497 435686724 532505996 580915632 798758994 871373448 1065011992 1198138491 1597517988 1742746896 2130023984 2396276982 3195035976 4792553964 6390071952 9585107928 19170215856 1210481847961 2420963695922 3631445543883 4841927391844 7262891087766 9683854783688 10894336631649 13315300327571 14525782175532 19367709567376 21788673263298 26630600655142 29051564351064 39945900982713 43577346526596 53261201310284 58103128702128 79891801965426 87154693053192 106522402620568 119837702948139 146468303603281 159783603930852 174309386106384 213044805241136 239675405896278 292936607206562 319567207861704 439404910809843 479350811792556 585873214413124 639134415723408 878809821619686 958701623585112 1171746428826248 1318214732429529 1757619643239372 1917403247170224 2343492857652496 2636429464859058 3515239286478744 5272858929718116 7030478572957488 10545717859436232 21091435718872464
• Sum of all divisors σ(n): 64880675539553419
• Sum of proper divisors (its aliquot sum) s(n): 43789239820680955
• 21091435718872464 is an abundant number, because the sum of its proper divisors (43789239820680955) is greater than itself. Its abundance is 22697804101808491

Bases of 21091435718872464

• Binary: 1001010111011101000110010001101110100111000110110010000₂
• Hexadecimal: 0x4AEE8C8DD38D90
• Base-36: 5ROAFT2A840

Squares and roots of 21091435718872464

• 21091435718872464 squared (21091435718872464²) is 444848660683329212269299497431296
• 21091435718872464 cubed (21091435718872464³) is 9382496931428946476703927392815207822157426233344
• 21091435718872464 is a perfect square number. Its square root is 145228908
• The cube root of 21091435718872464 is 276292.2572763781

Scales and comparisons

• 21,091,435,718,872,464 seconds is equal to 670,642,415 years, 39 weeks, 5 days, 19 hours, 14 minutes, 24 seconds.
• To count from 1 to 21,091,435,718,872,464 would take you about two billion, eleven million, nine hundred twenty-seven thousand, two hundred forty-seven 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 21091435718872464 cubic inches would be around 23024.4 feet tall.

Recreational maths with 21091435718872464

• 21091435718872464 backwards is 46427881753419012
• 21091435718872464 is a Harshad number.
• The number of decimal digits it has is: 17
• The sum of 21091435718872464's digits is 72
• More coming soon!