18664430 has 16 divisors (see below), whose sum is σ = 34416144. Its totient is φ = 7283520.

The previous prime is 18664417. The next prime is 18664433. The reversal of 18664430 is 3446681.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18664433) 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, 22352 + ... + 23171.

It is an arithmetic number, because the mean of its divisors is an integer number (2151009).

Almost surely, 2^18664430 is an apocalyptic number.

18664430 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

18664430 is a deficient number, since it is larger than the sum of its proper divisors (15751714).

18664430 is a wasteful number, since it uses less digits than its factorization.

18664430 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45571.

The product of its (nonzero) digits is 13824, while the sum is 32.

The square root of 18664430 is about 4320.2349473148. The cubic root of 18664430 is about 265.2598850739.

The spelling of 18664430 in words is "eighteen million, six hundred sixty-four thousand, four hundred thirty".