18040338554 has 32 divisors (see below), whose sum is σ = 31300079616. Its totient is φ = 7638482160.

The previous prime is 18040338541. The next prime is 18040338593. The reversal of 18040338554 is 45583304081.

It is a Smith number, since the sum of its digits (41) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 606989 + ... + 636015.

It is an arithmetic number, because the mean of its divisors is an integer number (978127488).

Almost surely, 2^18040338554 is an apocalyptic number.

18040338554 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

18040338554 is a deficient number, since it is larger than the sum of its proper divisors (13259741062).

18040338554 is a wasteful number, since it uses less digits than its factorization.

18040338554 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29570.

The product of its (nonzero) digits is 230400, while the sum is 41.

The spelling of 18040338554 in words is "eighteen billion, forty million, three hundred thirty-eight thousand, five hundred fifty-four".