21128877210

Names of 21128877210

• Cardinal: 21128877210 can be written as Twenty-one billion, one hundred twenty-eight million, eight hundred seventy-seven thousand, two hundred ten.

Scientific notation

• Scientific notation: 2.112887721 × 10¹⁰

Factors of 21128877210

• Number of distinct prime factors ω(n): 7
• Total number of prime factors Ω(n): 7
• Sum of prime factors: 23320

Divisors of 21128877210

• Number of divisors d(n): 128
• Complete list of divisors:
  1 2 3 5 6 7 10 14 15 17 21 30 34 35 42 51 70 85 102 105 119 170 210 238 255 257 357 510 514 595 714 771 1190 1285 1542 1785 1799 2570 3570 3598 3855 4369 5397 7710 8738 8995 10794 13107 17990 21845 23029 26214 26985 30583 43690 46058 53970 61166 65535 69087 91749 115145 131070 138174 152915 161203 183498 230290 305830 322406 345435 391493 458745 483609 690870 782986 806015 917490 967218 1174479 1612030 1957465 2348958 2418045 2740451 3914930 4836090 5480902 5872395 5918453 8221353 11744790 11836906 13702255 16442706 17755359 27404510 29592265 35510718 41106765 41429171 59184530 82213530 82858342 88776795 100613701 124287513 177553590 201227402 207145855 248575026 301841103 414291710 503068505 603682206 621437565 704295907 1006137010 1242875130 1408591814 1509205515 2112887721 3018411030 3521479535 4225775442 7042959070 10564438605 21128877210
• Sum of all divisors σ(n): 61603960320
• Sum of proper divisors (its aliquot sum) s(n): 40475083110
• 21128877210 is an abundant number, because the sum of its proper divisors (40475083110) is greater than itself. Its abundance is 19346205900

Bases of 21128877210

• Binary: 10011101011011000010001010010011010₂
• Hexadecimal: 0x4EB61149A
• Base-36: 9PFL5ZU

Squares and roots of 21128877210

• 21128877210 squared (21128877210²) is 446429452155257384100
• 21128877210 cubed (21128877210³) is 9432553077516003124594706361000
• The square root of 21128877210 is 145357.7559334211
• The cube root of 21128877210 is 2764.5565185529

Scales and comparisons

• 21,128,877,210 seconds is equal to 671 years, 43 weeks, 2 days, 4 hours, 33 minutes, 30 seconds.
• To count from 1 to 21,128,877,210 would take you about one thousand, three hundred forty-three 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 21128877210 cubic inches would be around 230.4 feet tall.

Recreational maths with 21128877210

• 21128877210 backwards is 01277882112
• The number of decimal digits it has is: 11
• The sum of 21128877210's digits is 39
• More coming soon!