11500233887 has 4 divisors (see below), whose sum is σ = 12000244080. Its totient is φ = 11000223696.

The previous prime is 11500233817. The next prime is 11500233907. The reversal of 11500233887 is 78833200511.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11500233887 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 11500233887.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11500233817) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 250005062 + ... + 250005107.

It is an arithmetic number, because the mean of its divisors is an integer number (3000061020).

Almost surely, 2^11500233887 is an apocalyptic number.

11500233887 is a deficient number, since it is larger than the sum of its proper divisors (500010193).

11500233887 is an equidigital number, since it uses as much as digits as its factorization.

11500233887 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 500010192.

The product of its (nonzero) digits is 40320, while the sum is 38.

The spelling of 11500233887 in words is "eleven billion, five hundred million, two hundred thirty-three thousand, eight hundred eighty-seven".