18409404928 has 40 divisors (see below), whose sum is σ = 37638314208. Its totient is φ = 8990628864.

The previous prime is 18409404899. The next prime is 18409404973. The reversal of 18409404928 is 82940490481.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 396076 + ... + 440107.

Almost surely, 2^18409404928 is an apocalyptic number.

It is an amenable number.

18409404928 is an abundant number, since it is smaller than the sum of its proper divisors (19228909280).

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

18409404928 is an frugal number, since it uses more digits than its factorization.

18409404928 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 836244 (or 836228 counting only the distinct ones).

The product of its (nonzero) digits is 663552, while the sum is 49.

The spelling of 18409404928 in words is "eighteen billion, four hundred nine million, four hundred four thousand, nine hundred twenty-eight".