18355042 has 16 divisors (see below), whose sum is σ = 27974232. Its totient is φ = 9031680.

The previous prime is 18355039. The next prime is 18355061. The reversal of 18355042 is 24055381.

It can be written as a sum of positive squares in 4 ways, for example, as 10621081 + 7733961 = 3259^2 + 2781^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 18355042.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 54298 + ... + 54634.

Almost surely, 2^18355042 is an apocalyptic number.

18355042 is a deficient number, since it is larger than the sum of its proper divisors (9619190).

18355042 is a wasteful number, since it uses less digits than its factorization.

18355042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 693.

The product of its (nonzero) digits is 4800, while the sum is 28.

The square root of 18355042 is about 4284.2784690074. The cubic root of 18355042 is about 263.7860314797.

It can be divided in two parts, 183 and 55042, that added together give a square (55225 = 235²).

The spelling of 18355042 in words is "eighteen million, three hundred fifty-five thousand, forty-two".