18265444 has 6 divisors (see below), whose sum is σ = 31964534. Its totient is φ = 9132720.

The previous prime is 18265421. The next prime is 18265451. The reversal of 18265444 is 44456281.

It can be written as a sum of positive squares in only one way, i.e., 16305444 + 1960000 = 4038^2 + 1400^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2283177 + ... + 2283184.

Almost surely, 2^18265444 is an apocalyptic number.

It is an amenable number.

18265444 is a deficient number, since it is larger than the sum of its proper divisors (13699090).

18265444 is a wasteful number, since it uses less digits than its factorization.

18265444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4566365 (or 4566363 counting only the distinct ones).

The product of its digits is 30720, while the sum is 34.

The square root of 18265444 is about 4273.8090738825. The cubic root of 18265444 is about 263.3561175963.

The spelling of 18265444 in words is "eighteen million, two hundred sixty-five thousand, four hundred forty-four".