18100806 has 32 divisors (see below), whose sum is σ = 38586240. Its totient is φ = 5644224.

The previous prime is 18100783. The next prime is 18100837. The reversal of 18100806 is 60800181.

18100806 = T₁₅₀ + T₁₅₁ + ... + T₄₈₁.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8506 + ... + 10418.

It is an arithmetic number, because the mean of its divisors is an integer number (1205820).

Almost surely, 2^18100806 is an apocalyptic number.

18100806 is an abundant number, since it is smaller than the sum of its proper divisors (20485434).

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

18100806 is a wasteful number, since it uses less digits than its factorization.

18100806 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2020.

The product of its (nonzero) digits is 384, while the sum is 24.

The square root of 18100806 is about 4254.5042014317. The cubic root of 18100806 is about 262.5624631400.

Adding to 18100806 its reverse (60800181), we get a palindrome (78900987).

The spelling of 18100806 in words is "eighteen million, one hundred thousand, eight hundred six".