18622544 has 40 divisors (see below), whose sum is σ = 37601760. Its totient is φ = 8926848.

The previous prime is 18622543. The next prime is 18622577. The reversal of 18622544 is 44522681.

It is a self number, because there is not a number n which added to its sum of digits gives 18622544.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18622543) 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, 48947 + ... + 49325.

It is an arithmetic number, because the mean of its divisors is an integer number (940044).

Almost surely, 2^18622544 is an apocalyptic number.

It is an amenable number.

18622544 is an abundant number, since it is smaller than the sum of its proper divisors (18979216).

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

18622544 is a wasteful number, since it uses less digits than its factorization.

18622544 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 507 (or 501 counting only the distinct ones).

The product of its digits is 15360, while the sum is 32.

The square root of 18622544 is about 4315.3845715069. The cubic root of 18622544 is about 265.0613077567.

The spelling of 18622544 in words is "eighteen million, six hundred twenty-two thousand, five hundred forty-four".