18125506 has 16 divisors (see below), whose sum is σ = 32708160. Its totient is φ = 7359120.

The previous prime is 18125477. The next prime is 18125507. The reversal of 18125506 is 60552181.

It is not an unprimeable number, because it can be changed into a prime (18125507) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 33805 + ... + 34336.

It is an arithmetic number, because the mean of its divisors is an integer number (2044260).

Almost surely, 2^18125506 is an apocalyptic number.

18125506 is a deficient number, since it is larger than the sum of its proper divisors (14582654).

18125506 is a wasteful number, since it uses less digits than its factorization.

18125506 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68169.

The product of its (nonzero) digits is 2400, while the sum is 28.

The square root of 18125506 is about 4257.4060177531. The cubic root of 18125506 is about 262.6818380299.

Adding to 18125506 its reverse (60552181), we get a palindrome (78677687).

The spelling of 18125506 in words is "eighteen million, one hundred twenty-five thousand, five hundred six".