18900517204 has 12 divisors (see below), whose sum is σ = 33079655700. Its totient is φ = 9449187008.

The previous prime is 18900517199. The next prime is 18900517211. The reversal of 18900517204 is 40271500981.

It can be written as a sum of positive squares in 2 ways, for example, as 8425404100 + 10475113104 = 91790^2 + 102348^2 .

It is a congruent 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, 227539 + ... + 299290.

It is an arithmetic number, because the mean of its divisors is an integer number (2756637975).

Almost surely, 2^18900517204 is an apocalyptic number.

It is an amenable number.

18900517204 is a deficient number, since it is larger than the sum of its proper divisors (14179138496).

18900517204 is a wasteful number, since it uses less digits than its factorization.

18900517204 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 535802 (or 535800 counting only the distinct ones).

The product of its (nonzero) digits is 20160, while the sum is 37.

The spelling of 18900517204 in words is "eighteen billion, nine hundred million, five hundred seventeen thousand, two hundred four".