18345428404 has 6 divisors (see below), whose sum is σ = 32104499714. Its totient is φ = 9172714200.

The previous prime is 18345428371. The next prime is 18345428411. The reversal of 18345428404 is 40482454381.

It can be written as a sum of positive squares in only one way, i.e., 17901904804 + 443523600 = 133798^2 + 21060^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2293178547 + ... + 2293178554.

Almost surely, 2^18345428404 is an apocalyptic number.

It is an amenable number.

18345428404 is a deficient number, since it is larger than the sum of its proper divisors (13759071310).

18345428404 is a wasteful number, since it uses less digits than its factorization.

18345428404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4586357105 (or 4586357103 counting only the distinct ones).

The product of its (nonzero) digits is 491520, while the sum is 43.

The spelling of 18345428404 in words is "eighteen billion, three hundred forty-five million, four hundred twenty-eight thousand, four hundred four".