18461806 has 32 divisors (see below), whose sum is σ = 32918400. Its totient is φ = 7670880.

The previous prime is 18461789. The next prime is 18461809. The reversal of 18461806 is 60816481.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18461809) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11361 + ... + 12883.

It is an arithmetic number, because the mean of its divisors is an integer number (1028700).

Almost surely, 2^18461806 is an apocalyptic number.

18461806 is a deficient number, since it is larger than the sum of its proper divisors (14456594).

18461806 is a wasteful number, since it uses less digits than its factorization.

18461806 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1584.

The product of its (nonzero) digits is 9216, while the sum is 34.

The square root of 18461806 is about 4296.7203772180. The cubic root of 18461806 is about 264.2964892890.

The spelling of 18461806 in words is "eighteen million, four hundred sixty-one thousand, eight hundred six".