18026244 has 18 divisors (see below), whose sum is σ = 45566430. Its totient is φ = 6008736.

The previous prime is 18026219. The next prime is 18026249. The reversal of 18026244 is 44262081.

It can be written as a sum of positive squares in only one way, i.e., 15303744 + 2722500 = 3912^2 + 1650^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is not an unprimeable number, because it can be changed into a prime (18026249) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 250329 + ... + 250400.

Almost surely, 2^18026244 is an apocalyptic number.

It is an amenable number.

18026244 is an abundant number, since it is smaller than the sum of its proper divisors (27540186).

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

18026244 is a wasteful number, since it uses less digits than its factorization.

18026244 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 500739 (or 500734 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 27.

The square root of 18026244 is about 4245.7324456447. The cubic root of 18026244 is about 262.2014456019.

The spelling of 18026244 in words is "eighteen million, twenty-six thousand, two hundred forty-four".