18243564568 has 16 divisors (see below), whose sum is σ = 34520508000. Its totient is φ = 9038095776.

The previous prime is 18243564553. The next prime is 18243564583. The reversal of 18243564568 is 86546534281.

It is an interprime number because it is at equal distance from previous prime (18243564553) and next prime (18243564583).

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 10459888 + ... + 10461631.

It is an arithmetic number, because the mean of its divisors is an integer number (2157531750).

Almost surely, 2^18243564568 is an apocalyptic number.

It is an amenable number.

18243564568 is a deficient number, since it is larger than the sum of its proper divisors (16276943432).

18243564568 is a wasteful number, since it uses less digits than its factorization.

18243564568 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20921634 (or 20921630 counting only the distinct ones).

The product of its digits is 5529600, while the sum is 52.

The spelling of 18243564568 in words is "eighteen billion, two hundred forty-three million, five hundred sixty-four thousand, five hundred sixty-eight".