20905194720

Names of 20905194720

• Cardinal: 20905194720 can be written as Twenty billion, nine hundred five million, one hundred ninety-four thousand, seven hundred twenty.

Scientific notation

• Scientific notation: 2.090519472 × 10¹⁰

Factors of 20905194720

• Number of distinct prime factors ω(n): 5
• Total number of prime factors Ω(n): 9
• Sum of prime factors: 1404960

Divisors of 20905194720

• Number of divisors d(n): 96
• Complete list of divisors:
  1 2 3 4 5 6 8 10 12 15 16 20 24 30 31 32 40 48 60 62 80 93 96 120 124 155 160 186 240 248 310 372 465 480 496 620 744 930 992 1240 1488 1860 2480 2976 3720 4960 7440 14880 1404919 2809838 4214757 5619676 7024595 8429514 11239352 14049190 16859028 21073785 22478704 28098380 33718056 42147570 43552489 44957408 56196760 67436112 84295140 87104978 112393520 130657467 134872224 168590280 174209956 217762445 224787040 261314934 337180560 348419912 435524890 522629868 653287335 674361120 696839824 871049780 1045259736 1306574670 1393679648 1742099560 2090519472 2613149340 3484199120 4181038944 5226298680 6968398240 10452597360 20905194720
• Sum of all divisors σ(n): 67975649280
• Sum of proper divisors (its aliquot sum) s(n): 47070454560
• 20905194720 is an abundant number, because the sum of its proper divisors (47070454560) is greater than itself. Its abundance is 26165259840

Bases of 20905194720

• Binary: 10011011110000010111111010011100000₂
• Hexadecimal: 0x4DE0BF4E0
• Base-36: 9LQEVHC

Squares and roots of 20905194720

• 20905194720 squared (20905194720²) is 437027166281115878400
• 20905194720 cubed (20905194720³) is 9136138009036545696835842048000
• The square root of 20905194720 is 144586.2881465597
• The cube root of 20905194720 is 2754.7661576901

Scales and comparisons

• 20,905,194,720 seconds is equal to 664 years, 37 weeks, 3 days, 6 hours, 32 minutes.
• To count from 1 to 20,905,194,720 would take you about one thousand, three hundred twenty-nine 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 20905194720 cubic inches would be around 229.6 feet tall.

Recreational maths with 20905194720

• 20905194720 backwards is 02749150902
• The number of decimal digits it has is: 11
• The sum of 20905194720's digits is 39
• More coming soon!