18545836404 has 12 divisors (see below), whose sum is σ = 43273618304. Its totient is φ = 6181945464.

The previous prime is 18545836357. The next prime is 18545836409. The reversal of 18545836404 is 40463854581.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18545836409) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 772743172 + ... + 772743195.

Almost surely, 2^18545836404 is an apocalyptic number.

It is an amenable number.

18545836404 is an abundant number, since it is smaller than the sum of its proper divisors (24727781900).

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

18545836404 is a wasteful number, since it uses less digits than its factorization.

18545836404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1545486374 (or 1545486372 counting only the distinct ones).

The product of its (nonzero) digits is 1843200, while the sum is 48.

The spelling of 18545836404 in words is "eighteen billion, five hundred forty-five million, eight hundred thirty-six thousand, four hundred four".