18505000554 has 16 divisors (see below), whose sum is σ = 37016091840. Its totient is φ = 6167318400.

The previous prime is 18505000537. The next prime is 18505000573. The reversal of 18505000554 is 45500050581.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 213799 + ... + 287610.

It is an arithmetic number, because the mean of its divisors is an integer number (2313505740).

Almost surely, 2^18505000554 is an apocalyptic number.

18505000554 is an abundant number, since it is smaller than the sum of its proper divisors (18511091286).

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

18505000554 is a wasteful number, since it uses less digits than its factorization.

18505000554 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 507565.

The product of its (nonzero) digits is 20000, while the sum is 33.

The spelling of 18505000554 in words is "eighteen billion, five hundred five million, five hundred fifty-four", and thus it is an aban number.