18664914 has 32 divisors (see below), whose sum is σ = 40218624. Its totient is φ = 5757840.

The previous prime is 18664913. The next prime is 18664949. The reversal of 18664914 is 41946681.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (18664913) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2097 + ... + 6459.

It is an arithmetic number, because the mean of its divisors is an integer number (1256832).

Almost surely, 2^18664914 is an apocalyptic number.

18664914 is an abundant number, since it is smaller than the sum of its proper divisors (21553710).

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

18664914 is a wasteful number, since it uses less digits than its factorization.

18664914 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4422.

The product of its digits is 41472, while the sum is 39.

The square root of 18664914 is about 4320.2909624237. The cubic root of 18664914 is about 265.2621779321.

The spelling of 18664914 in words is "eighteen million, six hundred sixty-four thousand, nine hundred fourteen".