18120402618 has 16 divisors (see below), whose sum is σ = 36259423200. Its totient is φ = 6037031216.

The previous prime is 18120402611. The next prime is 18120402637. The reversal of 18120402618 is 81620402181.

It is not an unprimeable number, because it can be changed into a prime (18120402611) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 763080 + ... + 786467.

It is an arithmetic number, because the mean of its divisors is an integer number (2266213950).

Almost surely, 2^18120402618 is an apocalyptic number.

18120402618 is an abundant number, since it is smaller than the sum of its proper divisors (18139020582).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

18120402618 is a wasteful number, since it uses less digits than its factorization.

18120402618 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1551501.

The product of its (nonzero) digits is 6144, while the sum is 33.

Adding to 18120402618 its reverse (81620402181), we get a palindrome (99740804799).

The spelling of 18120402618 in words is "eighteen billion, one hundred twenty million, four hundred two thousand, six hundred eighteen".