18340806 has 16 divisors (see below), whose sum is σ = 40016448. Its totient is φ = 5557800.

The previous prime is 18340769. The next prime is 18340813. The reversal of 18340806 is 60804381.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 138880 + ... + 139011.

It is an arithmetic number, because the mean of its divisors is an integer number (2501028).

Almost surely, 2^18340806 is an apocalyptic number.

18340806 is an abundant number, since it is smaller than the sum of its proper divisors (21675642).

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

18340806 is a wasteful number, since it uses less digits than its factorization.

18340806 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 277907.

The product of its (nonzero) digits is 4608, while the sum is 30.

The square root of 18340806 is about 4282.6167234531. The cubic root of 18340806 is about 263.7178171764.

The spelling of 18340806 in words is "eighteen million, three hundred forty thousand, eight hundred six".