21225213828

Names of 21225213828

• Cardinal: 21225213828 can be written as Twenty-one billion, two hundred twenty-five million, two hundred thirteen thousand, eight hundred twenty-eight.

Scientific notation

• Scientific notation: 2.1225213828 × 10¹⁰

Factors of 21225213828

• Number of distinct prime factors ω(n): 5
• Total number of prime factors Ω(n): 7
• Sum of prime factors: 6479028

Divisors of 21225213828

• Number of divisors d(n): 72
• Complete list of divisors:
  1 2 3 4 6 7 9 12 13 14 18 21 26 28 36 39 42 52 63 78 84 91 117 126 156 182 234 252 273 364 468 546 819 1092 1638 3276 6479003 12958006 19437009 25916012 38874018 45353021 58311027 77748036 84227039 90706042 116622054 136059063 168454078 181412084 233244108 252681117 272118126 336908156 408177189 505362234 544236252 589589273 758043351 816354378 1010724468 1179178546 1516086702 1632708756 1768767819 2358357092 3032173404 3537535638 5306303457 7075071276 10612606914 21225213828
• Sum of all divisors σ(n): 66034008768
• Sum of proper divisors (its aliquot sum) s(n): 44808794940
• 21225213828 is an abundant number, because the sum of its proper divisors (44808794940) is greater than itself. Its abundance is 23583581112

Bases of 21225213828

• Binary: 10011110001000111110000111110000100₂
• Hexadecimal: 0x4F11F0F84
• Base-36: 9R0XZT0

Squares and roots of 21225213828

• 21225213828 squared (21225213828²) is 450509702044322413584
• 21225213828 cubed (21225213828³) is 9562164757479311961693451839552
• The square root of 21225213828 is 145688.7566972825
• The cube root of 21225213828 is 2768.7517923593

Scales and comparisons

• 21,225,213,828 seconds is equal to 674 years, 46 weeks, 4 days, 4 hours, 43 minutes, 48 seconds.
• To count from 1 to 21,225,213,828 would take you about one thousand, three hundred forty-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 21225213828 cubic inches would be around 230.7 feet tall.

Recreational maths with 21225213828

• 21225213828 backwards is 82831252212
• 21225213828 is a Harshad number.
• The number of decimal digits it has is: 11
• The sum of 21225213828's digits is 36
• More coming soon!