18238204554 has 16 divisors (see below), whose sum is σ = 38622080448. Its totient is φ = 5721789632.

The previous prime is 18238204553. The next prime is 18238204561. The reversal of 18238204554 is 45540283281.

It is not an unprimeable number, because it can be changed into a prime (18238204553) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 89402862 + ... + 89403065.

It is an arithmetic number, because the mean of its divisors is an integer number (2413880028).

Almost surely, 2^18238204554 is an apocalyptic number.

18238204554 is an abundant number, since it is smaller than the sum of its proper divisors (20383875894).

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

18238204554 is a wasteful number, since it uses less digits than its factorization.

18238204554 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 178805949.

The product of its (nonzero) digits is 307200, while the sum is 42.

The spelling of 18238204554 in words is "eighteen billion, two hundred thirty-eight million, two hundred four thousand, five hundred fifty-four".