21528184821

Names of 21528184821

• Cardinal: 21528184821 can be written as Twenty-one billion, five hundred twenty-eight million, one hundred eighty-four thousand, eight hundred twenty-one.

Scientific notation

• Scientific notation: 2.1528184821 × 10¹⁰

Factors of 21528184821

• Number of distinct prime factors ω(n): 6
• Total number of prime factors Ω(n): 9
• Sum of prime factors: 100

Divisors of 21528184821

• Number of divisors d(n): 216
• Complete list of divisors:
  1 3 11 13 17 19 33 37 39 51 57 111 143 169 187 209 221 247 289 323 361 407 429 481 507 561 627 629 663 703 741 867 969 1083 1221 1443 1859 1887 2109 2431 2717 2873 3179 3211 3553 3757 3971 4199 4693 5291 5491 5577 6137 6253 6919 7293 7733 8151 8177 8619 9139 9537 9633 10659 10693 11271 11913 11951 12597 13357 14079 15873 16473 18411 18759 20757 23199 24531 27417 31603 32079 35321 35853 40071 41327 46189 48841 51623 54587 60401 61009 67507 68783 71383 79781 89947 94809 100529 104329 105963 106301 117623 118807 123981 131461 138567 139009 146523 146927 154869 155363 163761 173641 181203 183027 202521 203167 206349 214149 227069 239343 269841 301587 312987 318903 352869 356421 394383 417027 440781 466089 520923 537251 600457 609501 671099 681207 785213 877591 927979 1037153 1147619 1169311 1306877 1356277 1529099 1611753 1708993 1801371 1807117 1910051 2013297 2019719 2234837 2257333 2355639 2497759 2632773 2641171 2783937 2951897 3111459 3442857 3507933 3860173 3920631 4068831 4587297 5126979 5421351 5730153 6059157 6704511 6771999 7493277 7923513 8855691 10207769 11408683 11580519 14919047 17631601 19878287 22216909 24830663 29052881 30623307 32470867 34226049 34335223 38374661 42461903 44757141 50182249 52894803 59634861 66650727 74491989 87158643 97412601 103005669 115123983 127385709 150546747 193947611 377687453 422121271 552004739 581842833 652369237 1133062359 1266363813 1656014217 1957107711 7176061607 21528184821
• Sum of all divisors σ(n): 39042648864
• Sum of proper divisors (its aliquot sum) s(n): 17514464043
• 21528184821 is a deficient number, because the sum of its proper divisors (17514464043) is less than itself. Its deficiency is 4013720778

Bases of 21528184821

• Binary: 10100000011001011100000011111110101₂
• Hexadecimal: 0x5032E07F5
• Base-36: 9W1BPPX

Squares and roots of 21528184821

• 21528184821 squared (21528184821²) is 463462741687134802041
• 21528184821 cubed (21528184821³) is 9977511560688019376279896019661
• The square root of 21528184821 is 146724.8609506923
• The cube root of 21528184821 is 2781.8634238713

Scales and comparisons

• 21,528,184,821 seconds is equal to 684 years, 27 weeks, 3 days, 19 hours, 20 minutes, 21 seconds.
• To count from 1 to 21,528,184,821 would take you about one thousand, three hundred sixty-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 21528184821 cubic inches would be around 231.8 feet tall.

Recreational maths with 21528184821

• 21528184821 backwards is 12848182512
• The number of decimal digits it has is: 11
• The sum of 21528184821's digits is 42
• More coming soon!