23261913888 has 24 divisors (see below), whose sum is σ = 61062524208. Its totient is φ = 7753971264.

The previous prime is 23261913887. The next prime is 23261913901. The reversal of 23261913888 is 88831916232.

It is a tau number, because it is divible by the number of its divisors (24).

It is a super-2 number, since 2×23261913888² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 23261913888.

It is not an unprimeable number, because it can be changed into a prime (23261913887) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 121155706 + ... + 121155897.

It is an arithmetic number, because the mean of its divisors is an integer number (2544271842).

Almost surely, 2^23261913888 is an apocalyptic number.

It is an amenable number.

23261913888 is an abundant number, since it is smaller than the sum of its proper divisors (37800610320).

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

23261913888 is a wasteful number, since it uses less digits than its factorization.

23261913888 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 242311616 (or 242311608 counting only the distinct ones).

The product of its digits is 995328, while the sum is 51.

The spelling of 23261913888 in words is "twenty-three billion, two hundred sixty-one million, nine hundred thirteen thousand, eight hundred eighty-eight".