18336680569 has 9 divisors (see below), whose sum is σ = 19355278917. Its totient is φ = 17369154684.

The previous prime is 18336680561. The next prime is 18336680587. The reversal of 18336680569 is 96508663381.

The square root of 18336680569 is 135413.

It is a perfect power (a square), and thus also a powerful number.

It is not a de Polignac number, because 18336680569 - 2³ = 18336680561 is a prime.

It is a super-2 number, since 2×18336680569² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18336680561) 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 8 ways as a sum of consecutive naturals, for example, 2569284 + ... + 2576410.

Almost surely, 2^18336680569 is an apocalyptic number.

18336680569 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

18336680569 is the 135413-rd square number.

18336680569 is the 67707-th centered octagonal number.

It is an amenable number.

18336680569 is a deficient number, since it is larger than the sum of its proper divisors (1018598348).

18336680569 is an frugal number, since it uses more digits than its factorization.

18336680569 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14292 (or 7146 counting only the distinct ones).

The product of its (nonzero) digits is 5598720, while the sum is 55.

The spelling of 18336680569 in words is "eighteen billion, three hundred thirty-six million, six hundred eighty thousand, five hundred sixty-nine".