18448664 has 32 divisors (see below), whose sum is σ = 37966320. Its totient is φ = 8351616.

The previous prime is 18448663. The next prime is 18448667. The reversal of 18448664 is 46684481.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18448663) 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, 3839 + ... + 7185.

Almost surely, 2^18448664 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 18448664, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (18983160).

18448664 is an abundant number, since it is smaller than the sum of its proper divisors (19517656).

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

18448664 is a wasteful number, since it uses less digits than its factorization.

18448664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3419 (or 3415 counting only the distinct ones).

The product of its digits is 147456, while the sum is 41.

The square root of 18448664 is about 4295.1907990216. The cubic root of 18448664 is about 264.2337614251.

The spelling of 18448664 in words is "eighteen million, four hundred forty-eight thousand, six hundred sixty-four".