18544912 has 40 divisors (see below), whose sum is σ = 38568960. Its totient is φ = 8611200.

The previous prime is 18544907. The next prime is 18544927. The reversal of 18544912 is 21944581.

It is a happy number.

It is a super-2 number, since 2×18544912² = 687827522175488, which contains 22 as substring.

It is a Smith number, since the sum of its digits (34) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15537 + ... + 16687.

It is an arithmetic number, because the mean of its divisors is an integer number (964224).

Almost surely, 2^18544912 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18544912, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (19284480).

18544912 is an abundant number, since it is smaller than the sum of its proper divisors (20024048).

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

18544912 is a wasteful number, since it uses less digits than its factorization.

18544912 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1231 (or 1225 counting only the distinct ones).

The product of its digits is 11520, while the sum is 34.

The square root of 18544912 is about 4306.3803826416. The cubic root of 18544912 is about 264.6924734491.

The spelling of 18544912 in words is "eighteen million, five hundred forty-four thousand, nine hundred twelve".