18168811313 has 8 divisors (see below), whose sum is σ = 19230731520. Its totient is φ = 17117457840.

The previous prime is 18168811307. The next prime is 18168811327. The reversal of 18168811313 is 31311886181.

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

It is a cyclic number.

It is not a de Polignac number, because 18168811313 - 2⁶ = 18168811249 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18168810313) 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, 2638145 + ... + 2645022.

It is an arithmetic number, because the mean of its divisors is an integer number (2403841440).

Almost surely, 2^18168811313 is an apocalyptic number.

It is an amenable number.

18168811313 is a deficient number, since it is larger than the sum of its proper divisors (1061920207).

18168811313 is a wasteful number, since it uses less digits than its factorization.

18168811313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5283367.

The product of its digits is 27648, while the sum is 41.

The spelling of 18168811313 in words is "eighteen billion, one hundred sixty-eight million, eight hundred eleven thousand, three hundred thirteen".