18042804558 has 36 divisors (see below), whose sum is σ = 40023093240. Its totient is φ = 5874390648.

The previous prime is 18042804557. The next prime is 18042804583. The reversal of 18042804558 is 85540824081.

18042804558 is a `hidden beast` number, since 1 + 80 + 42 + 80 + 455 + 8 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18042804557) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 237778 + ... + 304341.

It is an arithmetic number, because the mean of its divisors is an integer number (1111752590).

Almost surely, 2^18042804558 is an apocalyptic number.

18042804558 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

18042804558 is an abundant number, since it is smaller than the sum of its proper divisors (21980288682).

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

18042804558 is a wasteful number, since it uses less digits than its factorization.

18042804558 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 542213 (or 542167 counting only the distinct ones).

The product of its (nonzero) digits is 409600, while the sum is 45.

The spelling of 18042804558 in words is "eighteen billion, forty-two million, eight hundred four thousand, five hundred fifty-eight".