11731323918 has 8 divisors (see below), whose sum is σ = 23462647848. Its totient is φ = 3910441304.

The previous prime is 11731323913. The next prime is 11731323931. The reversal of 11731323918 is 81932313711.

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

11731323918 is an admirable number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11731323913) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 977610321 + ... + 977610332.

It is an arithmetic number, because the mean of its divisors is an integer number (2932830981).

Almost surely, 2^11731323918 is an apocalyptic number.

11731323918 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

11731323918 is a wasteful number, since it uses less digits than its factorization.

11731323918 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1955220658.

The product of its digits is 27216, while the sum is 39.

The spelling of 11731323918 in words is "eleven billion, seven hundred thirty-one million, three hundred twenty-three thousand, nine hundred eighteen".