18305444 has 12 divisors (see below), whose sum is σ = 32779824. Its totient is φ = 8939784.

The previous prime is 18305423. The next prime is 18305449. The reversal of 18305444 is 44450381.

It is a hoax number, since the sum of its digits (29) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (18305449) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 53042 + ... + 53385.

It is an arithmetic number, because the mean of its divisors is an integer number (2731652).

Almost surely, 2^18305444 is an apocalyptic number.

It is an amenable number.

18305444 is a deficient number, since it is larger than the sum of its proper divisors (14474380).

18305444 is a wasteful number, since it uses less digits than its factorization.

18305444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 106474 (or 106472 counting only the distinct ones).

The product of its (nonzero) digits is 7680, while the sum is 29.

The square root of 18305444 is about 4278.4861808822. The cubic root of 18305444 is about 263.5482210441.

The spelling of 18305444 in words is "eighteen million, three hundred five thousand, four hundred forty-four".