16818477618 has 16 divisors (see below), whose sum is σ = 34139000160. Its totient is φ = 5522485056.

The previous prime is 16818477617. The next prime is 16818477659. The reversal of 16818477618 is 81677481861.

It is a super-2 number, since 2×16818477618² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (16818477617) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20918103 + ... + 20918906.

It is an arithmetic number, because the mean of its divisors is an integer number (2133687510).

Almost surely, 2^16818477618 is an apocalyptic number.

16818477618 is an abundant number, since it is smaller than the sum of its proper divisors (17320522542).

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

16818477618 is a wasteful number, since it uses less digits than its factorization.

16818477618 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41837081.

The product of its digits is 3612672, while the sum is 57.

The spelling of 16818477618 in words is "sixteen billion, eight hundred eighteen million, four hundred seventy-seven thousand, six hundred eighteen".