18116618 has 8 divisors (see below), whose sum is σ = 29265348. Its totient is φ = 8361504.

The previous prime is 18116597. The next prime is 18116653. The reversal of 18116618 is 81661181.

It can be written as a sum of positive squares in 2 ways, for example, as 18003049 + 113569 = 4243^2 + 337^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 348371 + ... + 348422.

Almost surely, 2^18116618 is an apocalyptic number.

18116618 is a deficient number, since it is larger than the sum of its proper divisors (11148730).

18116618 is a wasteful number, since it uses less digits than its factorization.

18116618 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 696808.

The product of its digits is 2304, while the sum is 32.

The square root of 18116618 is about 4256.3620616672. The cubic root of 18116618 is about 262.6388948996.

Adding to 18116618 its reverse (81661181), we get a palindrome (99777799).

The spelling of 18116618 in words is "eighteen million, one hundred sixteen thousand, six hundred eighteen".