11312181813 has 16 divisors (see below), whose sum is σ = 15175499456. Its totient is φ = 7495234560.

The previous prime is 11312181787. The next prime is 11312181833. The reversal of 11312181813 is 31818121311.

It is not a de Polignac number, because 11312181813 - 2¹⁴ = 11312165429 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11312181833) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 637998 + ... + 655488.

It is an arithmetic number, because the mean of its divisors is an integer number (948468716).

Almost surely, 2^11312181813 is an apocalyptic number.

It is an amenable number.

11312181813 is a deficient number, since it is larger than the sum of its proper divisors (3863317643).

11312181813 is a wasteful number, since it uses less digits than its factorization.

11312181813 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18804.

The product of its digits is 1152, while the sum is 30.

The spelling of 11312181813 in words is "eleven billion, three hundred twelve million, one hundred eighty-one thousand, eight hundred thirteen".