18485618 has 8 divisors (see below), whose sum is σ = 27765612. Its totient is φ = 9230416.

The previous prime is 18485611. The next prime is 18485627. The reversal of 18485618 is 81658481.

It can be written as a sum of positive squares in 2 ways, for example, as 17698849 + 786769 = 4207^2 + 887^2 .

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

It is not an unprimeable number, because it can be changed into a prime (18485611) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4205 + ... + 7392.

Almost surely, 2^18485618 is an apocalyptic number.

18485618 is a deficient number, since it is larger than the sum of its proper divisors (9279994).

18485618 is a wasteful number, since it uses less digits than its factorization.

18485618 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12396.

The product of its digits is 61440, while the sum is 41.

The square root of 18485618 is about 4299.4904349237. The cubic root of 18485618 is about 264.4100701632.

The spelling of 18485618 in words is "eighteen million, four hundred eighty-five thousand, six hundred eighteen".