21645289400

Names of 21645289400

• Cardinal: 21645289400 can be written as Twenty-one billion, six hundred forty-five million, two hundred eighty-nine thousand, four hundred.

Scientific notation

• Scientific notation: 2.16452894 × 10¹⁰

Factors of 21645289400

• Number of distinct prime factors ω(n): 4
• Total number of prime factors Ω(n): 9
• Sum of prime factors: 315543

Divisors of 21645289400

• Number of divisors d(n): 96
• Complete list of divisors:
  1 2 4 5 7 8 10 14 20 25 28 35 40 49 50 56 70 98 100 140 175 196 200 245 280 343 350 392 490 686 700 980 1225 1372 1400 1715 1960 2450 2744 3430 4900 6860 8575 9800 13720 17150 34300 68600 315529 631058 1262116 1577645 2208703 2524232 3155290 4417406 6310580 7888225 8834812 11043515 12621160 15460921 15776450 17669624 22087030 30921842 31552900 44174060 55217575 61843684 63105800 77304605 88348120 108226447 110435150 123687368 154609210 216452894 220870300 309218420 386523025 432905788 441740600 541132235 618436840 773046050 865811576 1082264470 1546092100 2164528940 2705661175 3092184200 4329057880 5411322350 10822644700 21645289400
• Sum of all divisors σ(n): 58688580000
• Sum of proper divisors (its aliquot sum) s(n): 37043290600
• 21645289400 is an abundant number, because the sum of its proper divisors (37043290600) is greater than itself. Its abundance is 15398001200

Bases of 21645289400

• Binary: 10100001010001010001110011110111000₂
• Hexadecimal: 0x50A28E7B8
• Base-36: 9XZ1O6W

Squares and roots of 21645289400

• 21645289400 squared (21645289400²) is 468518553209752360000
• 21645289400 cubed (21645289400³) is 10141219673494388734532984000000
• The square root of 21645289400 is 147123.3815543945
• The cube root of 21645289400 is 2786.8983744539

Scales and comparisons

• 21,645,289,400 seconds is equal to 688 years, 13 weeks, 1 day, 4 hours, 23 minutes, 20 seconds.
• To count from 1 to 21,645,289,400 would take you about one thousand, three hundred seventy-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 21645289400 cubic inches would be around 232.2 feet tall.

Recreational maths with 21645289400

• 21645289400 backwards is 00498254612
• The number of decimal digits it has is: 11
• The sum of 21645289400's digits is 41
• More coming soon!