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21421339386 = 23231181131437
BaseRepresentation
bin10011111100110011…
…111011001011111010
32001021220000210100020
4103330303323023322
5322332330330021
613501341351310
71355561244336
oct237463731372
961256023306
1021421339386
1190a2873377
124199b68536
132034cb8365
141072d907c6
158559287c6
hex4fccfb2fa

21421339386 has 32 divisors (see below), whose sum is σ = 44743598208. Its totient is φ = 6824157120.

The previous prime is 21421339367. The next prime is 21421339421. The reversal of 21421339386 is 68393312412.

It is a super-3 number, since 3×214213393863 (a number of 32 digits) contains 333 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 97260 + ... + 228696.

It is an arithmetic number, because the mean of its divisors is an integer number (1398237444).

Almost surely, 221421339386 is an apocalyptic number.

21421339386 is an abundant number, since it is smaller than the sum of its proper divisors (23322258822).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21421339386 is a wasteful number, since it uses less digits than its factorization.

21421339386 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 132646.

The product of its digits is 186624, while the sum is 42.

The spelling of 21421339386 in words is "twenty-one billion, four hundred twenty-one million, three hundred thirty-nine thousand, three hundred eighty-six".

Divisors: 1 2 3 6 23 46 69 138 1181 2362 3543 7086 27163 54326 81489 131437 162978 262874 394311 788622 3023051 6046102 9069153 18138306 155227097 310454194 465681291 931362582 3570223231 7140446462 10710669693 21421339386