18408118404 has 24 divisors (see below), whose sum is σ = 46256297920. Its totient is φ = 5664036384.

The previous prime is 18408118369. The next prime is 18408118433. The reversal of 18408118404 is 40481180481.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 59000224 + ... + 59000535.

Almost surely, 2^18408118404 is an apocalyptic number.

It is an amenable number.

18408118404 is an abundant number, since it is smaller than the sum of its proper divisors (27848179516).

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

18408118404 is a wasteful number, since it uses less digits than its factorization.

18408118404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 118000779 (or 118000777 counting only the distinct ones).

The product of its (nonzero) digits is 32768, while the sum is 39.

Adding to 18408118404 its reverse (40481180481), we get a palindrome (58889298885).

The spelling of 18408118404 in words is "eighteen billion, four hundred eight million, one hundred eighteen thousand, four hundred four".