18309434008204 has 12 divisors (see below), whose sum is σ = 32045130495000. Its totient is φ = 9153682438208.

The previous prime is 18309434008169. The next prime is 18309434008211. The reversal of 18309434008204 is 40280043490381.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 258601654 + ... + 258672445.

It is an arithmetic number, because the mean of its divisors is an integer number (2670427541250).

Almost surely, 2^{18309434008204} is an apocalyptic number.

It is an amenable number.

18309434008204 is a deficient number, since it is larger than the sum of its proper divisors (13735696486796).

18309434008204 is a wasteful number, since it uses less digits than its factorization.

18309434008204 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 517282952 (or 517282950 counting only the distinct ones).

The product of its (nonzero) digits is 663552, while the sum is 46.

Adding to 18309434008204 its reverse (40280043490381), we get a palindrome (58589477498585).

The spelling of 18309434008204 in words is "eighteen trillion, three hundred nine billion, four hundred thirty-four million, eight thousand, two hundred four".