18545436004 has 36 divisors (see below), whose sum is σ = 33316436160. Its totient is φ = 9031017520.

The previous prime is 18545435999. The next prime is 18545436029. The reversal of 18545436004 is 40063454581.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1951737 + ... + 1961215.

It is an arithmetic number, because the mean of its divisors is an integer number (925456560).

Almost surely, 2^18545436004 is an apocalyptic number.

It is an amenable number.

18545436004 is a deficient number, since it is larger than the sum of its proper divisors (14771000156).

18545436004 is an equidigital number, since it uses as much as digits as its factorization.

18545436004 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9720 (or 9635 counting only the distinct ones).

The product of its (nonzero) digits is 230400, while the sum is 40.

The spelling of 18545436004 in words is "eighteen billion, five hundred forty-five million, four hundred thirty-six thousand, four".