11187297823 has 32 divisors (see below), whose sum is σ = 12446784000. Its totient is φ = 9991403136.

The previous prime is 11187297791. The next prime is 11187297829. The reversal of 11187297823 is 32879278111.

It is not a de Polignac number, because 11187297823 - 2⁵ = 11187297791 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 (11187297829) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 19058136 + ... + 19058722.

It is an arithmetic number, because the mean of its divisors is an integer number (388962000).

Almost surely, 2^11187297823 is an apocalyptic number.

11187297823 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

11187297823 is a deficient number, since it is larger than the sum of its proper divisors (1259486177).

11187297823 is a wasteful number, since it uses less digits than its factorization.

11187297823 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 991.

The product of its digits is 338688, while the sum is 49.

The spelling of 11187297823 in words is "eleven billion, one hundred eighty-seven million, two hundred ninety-seven thousand, eight hundred twenty-three".