18508106 has 4 divisors (see below), whose sum is σ = 27762162. Its totient is φ = 9254052.

The previous prime is 18508093. The next prime is 18508117. The reversal of 18508106 is 60180581.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 9357481 + 9150625 = 3059^2 + 3025^2 .

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 as a sum of consecutive naturals, namely, 4627025 + ... + 4627028.

Almost surely, 2^18508106 is an apocalyptic number.

18508106 is a deficient number, since it is larger than the sum of its proper divisors (9254056).

18508106 is an equidigital number, since it uses as much as digits as its factorization.

18508106 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9254055.

The product of its (nonzero) digits is 1920, while the sum is 29.

The square root of 18508106 is about 4302.1048336832. The cubic root of 18508106 is about 264.5172461695.

Adding to 18508106 its reverse (60180581), we get a palindrome (78688687).

The spelling of 18508106 in words is "eighteen million, five hundred eight thousand, one hundred six".