21205467520

Names of 21205467520

• Cardinal: 21205467520 can be written as Twenty-one billion, two hundred five million, four hundred sixty-seven thousand, five hundred twenty.

Scientific notation

• Scientific notation: 2.120546752 × 10¹⁰

Factors of 21205467520

• Number of distinct prime factors ω(n): 4
• Total number of prime factors Ω(n): 12
• Sum of prime factors: 143

Divisors of 21205467520

• Number of divisors d(n): 128
• Complete list of divisors:
  1 2 4 5 8 10 16 20 32 40 47 64 80 89 94 128 160 178 188 235 320 356 376 445 470 640 712 752 890 940 1424 1504 1780 1880 2848 3008 3560 3760 4183 5696 6016 7120 7520 7921 8366 11392 14240 15040 15842 16732 20915 28480 30080 31684 33464 39605 41830 56960 63368 66928 79210 83660 126736 133856 158420 167320 253472 267712 316840 334640 372287 506944 535424 633680 669280 704969 744574 1013888 1267360 1338560 1409938 1489148 1861435 2534720 2677120 2819876 2978296 3524845 3722870 5069440 5639752 5956592 7049690 7445740 11279504 11913184 14099380 14891480 22559008 23826368 28198760 29782960 33133543 45118016 47652736 56397520 59565920 66267086 90236032 112795040 119131840 132534172 165667715 225590080 238263680 265068344 331335430 451180160 530136688 662670860 1060273376 1325341720 2120546752 2650683440 4241093504 5301366880 10602733760 21205467520
• Sum of all divisors σ(n): 52361251200
• Sum of proper divisors (its aliquot sum) s(n): 31155783680
• 21205467520 is an abundant number, because the sum of its proper divisors (31155783680) is greater than itself. Its abundance is 9950316160

Bases of 21205467520

• Binary: 10011101111111100011100000110000000₂
• Hexadecimal: 0x4EFF1C180
• Base-36: 9QP6RGG

Squares and roots of 21205467520

• 21205467520 squared (21205467520²) is 449671852741774950400
• 21205467520 cubed (21205467520³) is 9535501867973931657856811008000
• The square root of 21205467520 is 145620.9721159697
• The cube root of 21205467520 is 2767.8929146539

Scales and comparisons

• 21,205,467,520 seconds is equal to 674 years, 13 weeks, 6 days, 15 hours, 38 minutes, 40 seconds.
• To count from 1 to 21,205,467,520 would take you about one thousand, three hundred forty-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 21205467520 cubic inches would be around 230.7 feet tall.

Recreational maths with 21205467520

• 21205467520 backwards is 02576450212
• The number of decimal digits it has is: 11
• The sum of 21205467520's digits is 34
• More coming soon!