18808664 has 64 divisors (see below), whose sum is σ = 44582400. Its totient is φ = 7248384.

The previous prime is 18808663. The next prime is 18808667. The reversal of 18808664 is 46680881.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18808663) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21467 + ... + 22325.

It is an arithmetic number, because the mean of its divisors is an integer number (696600).

Almost surely, 2^18808664 is an apocalyptic number.

18808664 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18808664, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22291200).

18808664 is an abundant number, since it is smaller than the sum of its proper divisors (25773736).

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

18808664 is a wasteful number, since it uses less digits than its factorization.

18808664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 912 (or 908 counting only the distinct ones).

The product of its (nonzero) digits is 73728, while the sum is 41.

The square root of 18808664 is about 4336.8956639513. The cubic root of 18808664 is about 265.9414196287.

The spelling of 18808664 in words is "eighteen million, eight hundred eight thousand, six hundred sixty-four".