Base | Representation |
---|---|
bin | 10011111100110011… |
… | …111011001011111010 |
3 | 2001021220000210100020 |
4 | 103330303323023322 |
5 | 322332330330021 |
6 | 13501341351310 |
7 | 1355561244336 |
oct | 237463731372 |
9 | 61256023306 |
10 | 21421339386 |
11 | 90a2873377 |
12 | 4199b68536 |
13 | 2034cb8365 |
14 | 1072d907c6 |
15 | 8559287c6 |
hex | 4fccfb2fa |
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".
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