18664201 has 8 divisors (see below), whose sum is σ = 20104704. Its totient is φ = 17276160.

The previous prime is 18664199. The next prime is 18664229. The reversal of 18664201 is 10246681.

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 18664201 - 2¹ = 18664199 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 18664201.

It is not an unprimeable number, because it can be changed into a prime (18664291) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12376 + ... + 13801.

It is an arithmetic number, because the mean of its divisors is an integer number (2513088).

Almost surely, 2^18664201 is an apocalyptic number.

It is an amenable number.

18664201 is a deficient number, since it is larger than the sum of its proper divisors (1440503).

18664201 is a wasteful number, since it uses less digits than its factorization.

18664201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26231.

The product of its (nonzero) digits is 2304, while the sum is 28.

The square root of 18664201 is about 4320.2084440453. The cubic root of 18664201 is about 265.2588002160.

The spelling of 18664201 in words is "eighteen million, six hundred sixty-four thousand, two hundred one".