18003394558 has 16 divisors (see below), whose sum is σ = 28465557120. Its totient is φ = 8516180376.

The previous prime is 18003394537. The next prime is 18003394567. The reversal of 18003394558 is 85549330081.

It is a super-2 number, since 2×18003394558² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

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, 298216 + ... + 353467.

It is an arithmetic number, because the mean of its divisors is an integer number (1779097320).

Almost surely, 2^18003394558 is an apocalyptic number.

18003394558 is a deficient number, since it is larger than the sum of its proper divisors (10462162562).

18003394558 is a wasteful number, since it uses less digits than its factorization.

18003394558 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 652431.

The product of its (nonzero) digits is 518400, while the sum is 46.

The spelling of 18003394558 in words is "eighteen billion, three million, three hundred ninety-four thousand, five hundred fifty-eight".