21020820210

Names of 21020820210

• Cardinal: 21020820210 can be written as Twenty-one billion, twenty million, eight hundred twenty thousand, two hundred ten.

Scientific notation

• Scientific notation: 2.102082021 × 10¹⁰

Factors of 21020820210

• Number of distinct prime factors ω(n): 7
• Total number of prime factors Ω(n): 8
• Sum of prime factors: 1338

Divisors of 21020820210

• Number of divisors d(n): 192
• Complete list of divisors:
  1 2 3 5 6 9 10 13 15 18 26 30 39 45 61 65 78 90 117 122 130 183 195 234 305 313 366 390 549 585 610 626 793 915 939 941 1098 1170 1565 1586 1830 1878 1882 2379 2745 2817 2823 3130 3965 4069 4695 4705 4758 5490 5634 5646 7137 7930 8138 8469 9390 9410 11895 12207 12233 14085 14115 14274 16938 19093 20345 23790 24414 24466 28170 28230 35685 36621 36699 38186 40690 42345 57279 57401 61035 61165 71370 73242 73398 84690 95465 110097 114558 114802 122070 122330 171837 172203 183105 183495 190930 220194 248209 286395 287005 294533 343674 344406 366210 366990 496418 516609 550485 572790 574010 589066 744627 746213 859185 861015 883599 1033218 1100970 1241045 1472665 1489254 1492426 1718370 1722030 1767198 2233881 2238639 2482090 2583045 2650797 2945330 3723135 3731065 3828929 4417995 4467762 4477278 5166090 5301594 6715917 7446270 7462130 7657858 8835990 11169405 11193195 11486787 13253985 13431834 17966513 19144645 22338810 22386390 22973574 26507970 33579585 34460361 35933026 38289290 53899539 57433935 67159170 68920722 89832565 107799078 114867870 161698617 172301805 179665130 233564669 269497695 323397234 344603610 467129338 538995390 700694007 808493085 1167823345 1401388014 1616986170 2102082021 2335646690 3503470035 4204164042 7006940070 10510410105 21020820210
• Sum of all divisors σ(n): 60078092256
• Sum of proper divisors (its aliquot sum) s(n): 39057272046
• 21020820210 is an abundant number, because the sum of its proper divisors (39057272046) is greater than itself. Its abundance is 18036451836

Bases of 21020820210

• Binary: 10011100100111100000100001011110010₂
• Hexadecimal: 0x4E4F042F2
• Base-36: 9NN94OI

Squares and roots of 21020820210

• 21020820210 squared (21020820210²) is 441874882301144444100
• 21020820210 cubed (21020820210³) is 9288572456167268436666495261000
• The square root of 21020820210 is 144985.5862146303
• The cube root of 21020820210 is 2759.8356431743

Scales and comparisons

• 21,020,820,210 seconds is equal to 668 years, 20 weeks, 4 days, 12 hours, 43 minutes, 30 seconds.
• To count from 1 to 21,020,820,210 would take you about one thousand, three hundred thirty-six 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 21020820210 cubic inches would be around 230 feet tall.

Recreational maths with 21020820210

• 21020820210 backwards is 01202802012
• 21020820210 is a Harshad number.
• The number of decimal digits it has is: 11
• The sum of 21020820210's digits is 18
• More coming soon!