18266544 has 30 divisors (see below), whose sum is σ = 51121356. Its totient is φ = 6088800.

The previous prime is 18266513. The next prime is 18266561. The reversal of 18266544 is 44566281.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 18266499 and 18266508.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 63282 + ... + 63569.

Almost surely, 2^18266544 is an apocalyptic number.

It is an amenable number.

18266544 is an abundant number, since it is smaller than the sum of its proper divisors (32854812).

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

18266544 is a wasteful number, since it uses less digits than its factorization.

18266544 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 126865 (or 126856 counting only the distinct ones).

The product of its digits is 46080, while the sum is 36.

The square root of 18266544 is about 4273.9377627663. The cubic root of 18266544 is about 263.3614041895.

The spelling of 18266544 in words is "eighteen million, two hundred sixty-six thousand, five hundred forty-four".