21398215986

Names of 21398215986

• Cardinal: 21398215986 can be written as Twenty-one billion, three hundred ninety-eight million, two hundred fifteen thousand, nine hundred eighty-six.

Scientific notation

• Scientific notation: 2.1398215986 × 10¹⁰

Factors of 21398215986

• Number of distinct prime factors ω(n): 6
• Total number of prime factors Ω(n): 14
• Sum of prime factors: 159

Divisors of 21398215986

• Number of divisors d(n): 320
• Complete list of divisors:
  1 2 3 6 7 9 14 18 19 21 27 38 42 54 57 61 63 67 81 114 122 126 133 134 162 171 183 189 201 243 266 342 366 378 399 402 427 469 486 513 549 567 603 729 798 854 938 1026 1098 1134 1159 1197 1206 1273 1281 1407 1458 1539 1647 1701 1809 2187 2318 2394 2546 2562 2814 3078 3294 3402 3477 3591 3618 3819 3843 4087 4221 4374 4617 4941 5103 5427 6561 6954 7182 7638 7686 8113 8174 8442 8911 9234 9882 10206 10431 10773 10854 11457 11529 12261 12663 13122 13851 14823 15309 16226 16281 17822 19683 20862 21546 22914 23058 24339 24522 25326 26733 27702 28609 29646 30618 31293 32319 32562 34371 34587 36783 37989 39366 41553 44469 45927 48678 48843 53466 57218 62586 64638 68742 69174 73017 73566 75978 77653 80199 83106 85827 88938 91854 93879 96957 97686 103113 103761 110349 113967 124659 133407 137781 146034 146529 155306 160398 171654 187758 193914 206226 207522 219051 220698 227934 232959 240597 249318 257481 266814 275562 281637 290871 293058 309339 311283 331047 341901 373977 400221 438102 439587 465918 481194 514962 543571 563274 581742 618678 622566 657153 662094 683802 698877 721791 747954 772443 800442 844911 872613 879174 928017 933849 993141 1025703 1087142 1200663 1314306 1318761 1397754 1443582 1544886 1630713 1689822 1745226 1856034 1867698 1971459 1986282 2051406 2096631 2165373 2317329 2401326 2534733 2617839 2637522 2784051 2801547 2979423 3077109 3261426 3942918 4193262 4330746 4634658 4892139 5069466 5235678 5568102 5603094 5914377 5958846 6154218 6289893 6496119 6951987 7604199 8352153 8404641 8938269 9231327 9784278 11828754 12579786 12992238 13903974 14676417 15208398 16704306 16809282 17743131 17876538 18462654 18869679 19488357 20855961 22812597 25056459 26814807 29352834 35486262 37739358 38976714 41711922 44029251 45625194 50112918 53229393 53629614 56609037 58465071 62567883 80444421 88058502 106458786 113218074 116930142 125135766 132087753 159688179 160888842 169827111 175395213 187703649 264175506 319376358 339654222 350790426 375407298 396263259 509481333 563110947 792526518 1018962666 1126221894 1188789777 1528443999 2377579554 3056887998 3566369331 7132738662 10699107993 21398215986
• Sum of all divisors σ(n): 59747128320
• Sum of proper divisors (its aliquot sum) s(n): 38348912334
• 21398215986 is an abundant number, because the sum of its proper divisors (38348912334) is greater than itself. Its abundance is 16950696348

Bases of 21398215986

• Binary: 10011111011011011101101110100110010₂
• Hexadecimal: 0x4FB6EDD32
• Base-36: 9TVY14I

Squares and roots of 21398215986

• 21398215986 squared (21398215986²) is 457883647383505952196
• 21398215986 cubed (21398215986³) is 9797893183169724139006599005256
• The square root of 21398215986 is 146281.2906218701
• The cube root of 21398215986 is 2776.2539466579

Scales and comparisons

• 21,398,215,986 seconds is equal to 680 years, 20 weeks, 4 days, 12 hours, 53 minutes, 6 seconds.
• To count from 1 to 21,398,215,986 would take you about one thousand, three hundred sixty 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 21398215986 cubic inches would be around 231.4 feet tall.

Recreational maths with 21398215986

• 21398215986 backwards is 68951289312
• 21398215986 is a Harshad number.
• The number of decimal digits it has is: 11
• The sum of 21398215986's digits is 54
• More coming soon!