11173021718 has 4 divisors (see below), whose sum is σ = 16759532580. Its totient is φ = 5586510858.

The previous prime is 11173021693. The next prime is 11173021729. The reversal of 11173021718 is 81712037111.

11173021718 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 2793255428 + ... + 2793255431.

It is an arithmetic number, because the mean of its divisors is an integer number (4189883145).

Almost surely, 2^11173021718 is an apocalyptic number.

11173021718 is a deficient number, since it is larger than the sum of its proper divisors (5586510862).

11173021718 is an equidigital number, since it uses as much as digits as its factorization.

11173021718 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5586510861.

The product of its (nonzero) digits is 2352, while the sum is 32.

Adding to 11173021718 its reverse (81712037111), we get a palindrome (92885058829).

The spelling of 11173021718 in words is "eleven billion, one hundred seventy-three million, twenty-one thousand, seven hundred eighteen".