18493209404 has 12 divisors (see below), whose sum is σ = 33479086200. Its totient is φ = 8927756208.

The previous prime is 18493209403. The next prime is 18493209419. The reversal of 18493209404 is 40490239481.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18493209403) 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, 79711994 + ... + 79712225.

It is an arithmetic number, because the mean of its divisors is an integer number (2789923850).

Almost surely, 2^18493209404 is an apocalyptic number.

It is an amenable number.

18493209404 is a deficient number, since it is larger than the sum of its proper divisors (14985876796).

18493209404 is a wasteful number, since it uses less digits than its factorization.

18493209404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 159424252 (or 159424250 counting only the distinct ones).

The product of its (nonzero) digits is 248832, while the sum is 44.

The spelling of 18493209404 in words is "eighteen billion, four hundred ninety-three million, two hundred nine thousand, four hundred four".