18316500444 has 144 divisors (see below), whose sum is σ = 52118277120. Its totient is φ = 5376309120.

The previous prime is 18316500413. The next prime is 18316500469. The reversal of 18316500444 is 44400561381.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 18316500399 and 18316500408.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1652529 + ... + 1663575.

It is an arithmetic number, because the mean of its divisors is an integer number (361932480).

Almost surely, 2^18316500444 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18316500444, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26059138560).

18316500444 is an abundant number, since it is smaller than the sum of its proper divisors (33801776676).

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

18316500444 is a wasteful number, since it uses less digits than its factorization.

18316500444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11200 (or 11195 counting only the distinct ones).

The product of its (nonzero) digits is 46080, while the sum is 36.

The spelling of 18316500444 in words is "eighteen billion, three hundred sixteen million, five hundred thousand, four hundred forty-four".