18366806 has 8 divisors (see below), whose sum is σ = 29000280. Its totient is φ = 8700048.

The previous prime is 18366793. The next prime is 18366809. The reversal of 18366806 is 60866381.

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

It is a Harshad number since it is a multiple of its sum of digits (38), and also a Moran number because the ratio is a prime number: 483337 = 18366806 / (1 + 8 + 3 + 6 + 6 + 8 + 0 + 6).

It is a self number, because there is not a number n which added to its sum of digits gives 18366806.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18366809) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 241631 + ... + 241706.

It is an arithmetic number, because the mean of its divisors is an integer number (3625035).

Almost surely, 2^18366806 is an apocalyptic number.

18366806 is a deficient number, since it is larger than the sum of its proper divisors (10633474).

18366806 is a wasteful number, since it uses less digits than its factorization.

18366806 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 483358.

The product of its (nonzero) digits is 41472, while the sum is 38.

The square root of 18366806 is about 4285.6511757258. The cubic root of 18366806 is about 263.8423741485.

The spelling of 18366806 in words is "eighteen million, three hundred sixty-six thousand, eight hundred six".