23311030987 has 4 divisors (see below), whose sum is σ = 23541833376. Its totient is φ = 23080228600.

The previous prime is 23311030903. The next prime is 23311031017. The reversal of 23311030987 is 78903011332.

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-23311030987 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (23311030187) 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, 115401043 + ... + 115401244.

It is an arithmetic number, because the mean of its divisors is an integer number (5885458344).

Almost surely, 2^23311030987 is an apocalyptic number.

23311030987 is a deficient number, since it is larger than the sum of its proper divisors (230802389).

23311030987 is a wasteful number, since it uses less digits than its factorization.

23311030987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 230802388.

The product of its (nonzero) digits is 27216, while the sum is 37.

The spelling of 23311030987 in words is "twenty-three billion, three hundred eleven million, thirty thousand, nine hundred eighty-seven".