18198806 has 16 divisors (see below), whose sum is σ = 29122416. Its totient is φ = 8499456.

The previous prime is 18198799. The next prime is 18198833. The reversal of 18198806 is 60889181.

18198806 is nontrivially palindromic in base 11.

It is a congruent number.

It is an unprimeable number.

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, 2705 + ... + 6611.

It is an arithmetic number, because the mean of its divisors is an integer number (1820151).

Almost surely, 2^18198806 is an apocalyptic number.

18198806 is a deficient number, since it is larger than the sum of its proper divisors (10923610).

18198806 is a wasteful number, since it uses less digits than its factorization.

18198806 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4063.

The product of its (nonzero) digits is 27648, while the sum is 41.

The square root of 18198806 is about 4266.0058602866. The cubic root of 18198806 is about 263.0354590829.

The spelling of 18198806 in words is "eighteen million, one hundred ninety-eight thousand, eight hundred six".