18556342 has 16 divisors (see below), whose sum is σ = 31956480. Its totient is φ = 7916328.

The previous prime is 18556327. The next prime is 18556379. The reversal of 18556342 is 24365581.

It is a junction number, because it is equal to n+sod(n) for n = 18556298 and 18556307.

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, 259 + ... + 6097.

It is an arithmetic number, because the mean of its divisors is an integer number (1997280).

Almost surely, 2^18556342 is an apocalyptic number.

18556342 is a deficient number, since it is larger than the sum of its proper divisors (13400138).

18556342 is a wasteful number, since it uses less digits than its factorization.

18556342 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6075.

The product of its digits is 28800, while the sum is 34.

The square root of 18556342 is about 4307.7072788201. The cubic root of 18556342 is about 264.7468426046.

The spelling of 18556342 in words is "eighteen million, five hundred fifty-six thousand, three hundred forty-two".