18530844 has 24 divisors (see below), whose sum is σ = 43321488. Its totient is φ = 6165120.

The previous prime is 18530843. The next prime is 18530849. The reversal of 18530844 is 44803581.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18530843) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6984 + ... + 9264.

It is an arithmetic number, because the mean of its divisors is an integer number (1805062).

Almost surely, 2^18530844 is an apocalyptic number.

It is an amenable number.

18530844 is an abundant number, since it is smaller than the sum of its proper divisors (24790644).

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

18530844 is a wasteful number, since it uses less digits than its factorization.

18530844 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2965 (or 2963 counting only the distinct ones).

The product of its (nonzero) digits is 15360, while the sum is 33.

The square root of 18530844 is about 4304.7466824425. The cubic root of 18530844 is about 264.6255254240.

The spelling of 18530844 in words is "eighteen million, five hundred thirty thousand, eight hundred forty-four".