21388913784225

Names of 21388913784225

• Cardinal: 21388913784225 can be written as Twenty-one trillion, three hundred eighty-eight billion, nine hundred thirteen million, seven hundred eighty-four thousand, two hundred twenty-five.

Scientific notation

• Scientific notation: 2.1388913784225 × 10¹³

Factors of 21388913784225

• Number of distinct prime factors ω(n): 5
• Total number of prime factors Ω(n): 10
• Sum of prime factors: 699

Divisors of 21388913784225

• Number of divisors d(n): 243
• Complete list of divisors:
  1 3 5 9 13 15 25 37 39 45 65 75 111 117 169 185 195 225 325 333 481 507 555 585 641 845 925 975 1369 1443 1521 1665 1923 2405 2535 2775 2925 3205 4107 4225 4329 5769 6253 6845 7215 7605 8325 8333 9615 12025 12321 12675 16025 17797 18759 20535 21645 23717 24999 28845 31265 34225 36075 38025 41665 48075 53391 56277 61605 71151 74997 88985 93795 102675 108225 108329 118585 124995 144225 156325 160173 208325 213453 231361 266955 281385 308025 308321 324987 355755 374985 410881 444925 468975 541645 592925 624975 694083 800865 877529 924963 974961 1067265 1156805 1232643 1334775 1406925 1541605 1624935 1778775 1874925 2054405 2082249 2632587 2708225 2774889 3470415 3697929 4004325 4008173 4387645 4624815 4874805 5336325 5341453 5784025 6163215 7708025 7897761 8124675 10272025 10411245 11407877 12024519 13162935 13874445 15202597 16024359 17352075 18489645 20040865 21938225 23124075 24374025 26707265 30816075 34223631 36073557 39488805 45607791 48073077 52056225 57039385 60122595 65814675 69372225 69438889 76012985 80121795 92448225 100204325 102670893 133536325 136823373 148302401 171118155 180367785 197444025 197633761 208316667 228038955 240365385 285196925 300612975 347194445 380064925 400608975 444907203 513354465 562496089 592901283 624950001 684116865 741512005 855590775 901838925 988168805 1041583335 1140194775 1201826925 1334721609 1687488267 1735972225 1778703849 2224536015 2566772325 2569238893 2812480445 2964506415 3124750005 3420584325 3707560025 4940844025 5062464801 5207916675 6673608045 7312449157 7707716679 8437441335 8893519245 11122680075 12846194465 14062402225 14822532075 15623750025 21937347471 23123150037 25312324005 33368040225 36562245785 38538583395 42187206675 44467596225 64230972325 65812042413 95061839041 109686737355 115615750185 126561620025 182811228925 192692916975 285185517123 329060212065 475309195205 548433686775 578078750925 855556551369 1425927585615 1645301060325 2376545976025 4277782756845 7129637928075 21388913784225
• Sum of all divisors σ(n): 42701619485889
• Sum of proper divisors (its aliquot sum) s(n): 21312705701664
• 21388913784225 is a deficient number, because the sum of its proper divisors (21312705701664) is less than itself. Its deficiency is 76208082561

Bases of 21388913784225

• Binary: 100110111001111111110100110111011010110100001₂
• Hexadecimal: 0x1373FE9BB5A1
• Base-36: 7KXXJ0S69

Squares and roots of 21388913784225

• 21388913784225 squared (21388913784225²) is 457485632869010209858850625
• 21388913784225 cubed (21388913784225³) is 9785120758956870211482230124677756390625
• 21388913784225 is a perfect square number. Its square root is 4624815
• The cube root of 21388913784225 is 27758.5159197007

Scales and comparisons

• 21,388,913,784,225 seconds is equal to 680,101 years, 15 weeks, 3 days, 12 hours, 3 minutes, 45 seconds.
• To count from 1 to 21,388,913,784,225 would take you about one million, seven hundred thousand, two hundred fifty-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 21388913784225 cubic inches would be around 2313.2 feet tall.

Recreational maths with 21388913784225

• 21388913784225 backwards is 52248731988312
• The number of decimal digits it has is: 14
• The sum of 21388913784225's digits is 63
• More coming soon!