18355436404 has 12 divisors (see below), whose sum is σ = 32128339264. Its totient is φ = 9175910904.

The previous prime is 18355436389. The next prime is 18355436423. The reversal of 18355436404 is 40463455381.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 428844 + ... + 469699.

Almost surely, 2^18355436404 is an apocalyptic number.

It is an amenable number.

18355436404 is a deficient number, since it is larger than the sum of its proper divisors (13772902860).

18355436404 is a wasteful number, since it uses less digits than its factorization.

18355436404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 903654 (or 903652 counting only the distinct ones).

The product of its (nonzero) digits is 691200, while the sum is 43.

The spelling of 18355436404 in words is "eighteen billion, three hundred fifty-five million, four hundred thirty-six thousand, four hundred four".