18944416 has 24 divisors (see below), whose sum is σ = 37455264. Its totient is φ = 9432000.

The previous prime is 18944413. The next prime is 18944417. The reversal of 18944416 is 61444981.

It is not an unprimeable number, because it can be changed into a prime (18944411) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7291 + ... + 9541.

It is an arithmetic number, because the mean of its divisors is an integer number (1560636).

Almost surely, 2^18944416 is an apocalyptic number.

18944416 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

18944416 is a deficient number, since it is larger than the sum of its proper divisors (18510848).

18944416 is a wasteful number, since it uses less digits than its factorization.

18944416 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2524 (or 2516 counting only the distinct ones).

The product of its digits is 27648, while the sum is 37.

The square root of 18944416 is about 4352.5183514834. The cubic root of 18944416 is about 266.5796994185.

The spelling of 18944416 in words is "eighteen million, nine hundred forty-four thousand, four hundred sixteen".