18668573 has 8 divisors (see below), whose sum is σ = 23275200. Its totient is φ = 14546880.

The previous prime is 18668557. The next prime is 18668581. The reversal of 18668573 is 37586681.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 18668573 - 2⁴ = 18668557 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18668513) 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 7 ways as a sum of consecutive naturals, for example, 121148 + ... + 121301.

It is an arithmetic number, because the mean of its divisors is an integer number (2909400).

Almost surely, 2^18668573 is an apocalyptic number.

It is an amenable number.

18668573 is a deficient number, since it is larger than the sum of its proper divisors (4606627).

18668573 is a wasteful number, since it uses less digits than its factorization.

18668573 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 242467.

The product of its digits is 241920, while the sum is 44.

The square root of 18668573 is about 4320.7144085209. The cubic root of 18668573 is about 265.2795104683.

The spelling of 18668573 in words is "eighteen million, six hundred sixty-eight thousand, five hundred seventy-three".