18875664 has 60 divisors (see below), whose sum is σ = 55614000. Its totient is φ = 5959872.

The previous prime is 18875653. The next prime is 18875669. The reversal of 18875664 is 46657881.

It is a happy number.

18875664 is a `hidden beast` number, since 1 + 8 + 87 + 566 + 4 = 666.

It is not an unprimeable number, because it can be changed into a prime (18875669) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 714 + ... + 6185.

It is an arithmetic number, because the mean of its divisors is an integer number (926900).

Almost surely, 2^18875664 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 18875664, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27807000).

18875664 is an abundant number, since it is smaller than the sum of its proper divisors (36738336).

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

18875664 is a wasteful number, since it uses less digits than its factorization.

18875664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6932 (or 6923 counting only the distinct ones).

The product of its digits is 322560, while the sum is 45.

The square root of 18875664 is about 4344.6132163865. The cubic root of 18875664 is about 266.2568232067.

The spelling of 18875664 in words is "eighteen million, eight hundred seventy-five thousand, six hundred sixty-four".