23311208987 has 8 divisors (see below), whose sum is σ = 25847302512. Its totient is φ = 20844597600.

The previous prime is 23311208923. The next prime is 23311209011. The reversal of 23311208987 is 78980211332.

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

It is a cyclic number.

It is not a de Polignac number, because 23311208987 - 2⁶ = 23311208923 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (23311238987) 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 7 ways as a sum of consecutive naturals, for example, 17369828 + ... + 17371169.

It is an arithmetic number, because the mean of its divisors is an integer number (3230912814).

Almost surely, 2^23311208987 is an apocalyptic number.

23311208987 is a deficient number, since it is larger than the sum of its proper divisors (2536093525).

23311208987 is a wasteful number, since it uses less digits than its factorization.

23311208987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34741069.

The product of its (nonzero) digits is 145152, while the sum is 44.

The spelling of 23311208987 in words is "twenty-three billion, three hundred eleven million, two hundred eight thousand, nine hundred eighty-seven".