21428835820

Names of 21428835820

• Cardinal: 21428835820 can be written as Twenty-one billion, four hundred twenty-eight million, eight hundred thirty-five thousand, eight hundred twenty.

Scientific notation

• Scientific notation: 2.142883582 × 10¹⁰

Factors of 21428835820

• Number of distinct prime factors ω(n): 5
• Total number of prime factors Ω(n): 9
• Sum of prime factors: 302

Divisors of 21428835820

• Number of divisors d(n): 144
• Complete list of divisors:
  1 2 4 5 7 10 14 20 28 35 49 70 98 137 140 151 196 245 274 302 343 490 548 604 685 686 755 959 980 1057 1370 1372 1510 1715 1918 2114 2740 3020 3430 3836 4228 4795 5285 6713 6860 7399 9590 10570 13426 14798 19180 20687 21140 22801 26852 29596 33565 36995 41374 45602 46991 51793 67130 73990 82748 91204 93982 103435 103586 114005 134260 144809 147980 159607 187964 206870 207172 228010 234955 258965 289618 319214 413740 456020 469910 517930 579236 638428 724045 798035 939820 1013663 1035860 1117249 1448090 1596070 2027326 2234498 2896180 3123737 3192140 4054652 4468996 5068315 5586245 6247474 7095641 7820743 10136630 11172490 12494948 14191282 15618685 15641486 20273260 21866159 22344980 28382564 31237370 31282972 35478205 39103715 43732318 62474740 70956410 78207430 87464636 109330795 141912820 153063113 156414860 218661590 306126226 437323180 612252452 765315565 1071441791 1530631130 2142883582 3061262260 4285767164 5357208955 10714417910 21428835820
• Sum of all divisors σ(n): 53214235200
• Sum of proper divisors (its aliquot sum) s(n): 31785399380
• 21428835820 is an abundant number, because the sum of its proper divisors (31785399380) is greater than itself. Its abundance is 10356563560

Bases of 21428835820

• Binary: 10011111101010000100001010111101100₂
• Hexadecimal: 0x4FD4215EC
• Base-36: 9UE6BJG

Squares and roots of 21428835820

• 21428835820 squared (21428835820²) is 459195004600515072400
• 21428835820 cubed (21428835820³) is 9840014362948582173895013368000
• The square root of 21428835820 is 146385.9140081449
• The cube root of 21428835820 is 2777.5775448427

Scales and comparisons

• 21,428,835,820 seconds is equal to 681 years, 19 weeks, 1 day, 22 hours, 23 minutes, 40 seconds.
• To count from 1 to 21,428,835,820 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 21428835820 cubic inches would be around 231.5 feet tall.

Recreational maths with 21428835820

• 21428835820 backwards is 02853882412
• The number of decimal digits it has is: 11
• The sum of 21428835820's digits is 43
• More coming soon!