18316944 has 60 divisors (see below), whose sum is σ = 51706512. Its totient is φ = 6052800.

The previous prime is 18316927. The next prime is 18316957. The reversal of 18316944 is 44961381.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

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

It is a nude number because it is divisible by every one of its digits.

It is a junction number, because it is equal to n+sod(n) for n = 18316899 and 18316908.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 18379 + ... + 19349.

Almost surely, 2^18316944 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 18316944, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25853256).

18316944 is an abundant number, since it is smaller than the sum of its proper divisors (33389568).

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

18316944 is a wasteful number, since it uses less digits than its factorization.

18316944 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1116 (or 1107 counting only the distinct ones).

The product of its digits is 20736, while the sum is 36.

The square root of 18316944 is about 4279.8299031620. The cubic root of 18316944 is about 263.6033989843.

The spelling of 18316944 in words is "eighteen million, three hundred sixteen thousand, nine hundred forty-four".