Base | Representation |
---|---|
bin | 100010100101… |
… | …0011010110111 |
3 | 1021010010112021 |
4 | 1011022122313 |
5 | 14120134430 |
6 | 1444334011 |
7 | 310051636 |
oct | 105123267 |
9 | 37103467 |
10 | 18130615 |
11 | a263888 |
12 | 60a4307 |
13 | 39aa599 |
14 | 259d51d |
15 | 18d207a |
hex | 114a6b7 |
18130615 has 8 divisors (see below), whose sum is σ = 21960720. Its totient is φ = 14368512.
The previous prime is 18130591. The next prime is 18130621. The reversal of 18130615 is 51603181.
It is a sphenic number, since it is the product of 3 distinct primes.
It is a cyclic number.
It is not a de Polignac number, because 18130615 - 25 = 18130583 is a prime.
It is a self number, because there is not a number n which added to its sum of digits gives 18130615.
It is a congruent number.
It is an unprimeable number.
It is a pernicious number, because its binary representation contains a prime number (13) of ones.
It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16410 + ... + 17479.
It is an arithmetic number, because the mean of its divisors is an integer number (2745090).
Almost surely, 218130615 is an apocalyptic number.
18130615 is a deficient number, since it is larger than the sum of its proper divisors (3830105).
18130615 is a wasteful number, since it uses less digits than its factorization.
18130615 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 34001.
The product of its (nonzero) digits is 720, while the sum is 25.
The square root of 18130615 is about 4258.0059887229. The cubic root of 18130615 is about 262.7065162456.
Adding to 18130615 its reverse (51603181), we get a palindrome (69733796).
The spelling of 18130615 in words is "eighteen million, one hundred thirty thousand, six hundred fifteen".
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