18043804400 has 60 divisors (see below), whose sum is σ = 43691703552. Its totient is φ = 7160670720.

The previous prime is 18043804399. The next prime is 18043804409. The reversal of 18043804400 is 440834081.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18043804409) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 126797 + ... + 228396.

Almost surely, 2^18043804400 is an apocalyptic number.

18043804400 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18043804400 is an abundant number, since it is smaller than the sum of its proper divisors (25647899152).

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

18043804400 is a wasteful number, since it uses less digits than its factorization.

18043804400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 355338 (or 355327 counting only the distinct ones).

The product of its (nonzero) digits is 12288, while the sum is 32.

The spelling of 18043804400 in words is "eighteen billion, forty-three million, eight hundred four thousand, four hundred".