18443600844 has 48 divisors (see below), whose sum is σ = 44817948000. Its totient is φ = 5896016896.

The previous prime is 18443600839. The next prime is 18443600881. The reversal of 18443600844 is 44800634481.

It is a junction number, because it is equal to n+sod(n) for n = 18443600796 and 18443600805.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 125997 + ... + 229700.

It is an arithmetic number, because the mean of its divisors is an integer number (933707250).

Almost surely, 2^18443600844 is an apocalyptic number.

It is an amenable number.

18443600844 is an abundant number, since it is smaller than the sum of its proper divisors (26374347156).

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

18443600844 is a wasteful number, since it uses less digits than its factorization.

18443600844 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 355882 (or 355880 counting only the distinct ones).

The product of its (nonzero) digits is 294912, while the sum is 42.

The spelling of 18443600844 in words is "eighteen billion, four hundred forty-three million, six hundred thousand, eight hundred forty-four".