18506606 has 16 divisors (see below), whose sum is σ = 28377216. Its totient is φ = 9049656.

The previous prime is 18506603. The next prime is 18506617. The reversal of 18506606 is 60660581.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18506603) 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 7 ways as a sum of consecutive naturals, for example, 21965 + ... + 22791.

It is an arithmetic number, because the mean of its divisors is an integer number (1773576).

Almost surely, 2^18506606 is an apocalyptic number.

18506606 is a deficient number, since it is larger than the sum of its proper divisors (9870610).

18506606 is a wasteful number, since it uses less digits than its factorization.

18506606 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1063.

The product of its (nonzero) digits is 8640, while the sum is 32.

The square root of 18506606 is about 4301.9304968816. The cubic root of 18506606 is about 264.5100999928.

The spelling of 18506606 in words is "eighteen million, five hundred six thousand, six hundred six".