23111685912 has 256 divisors, whose sum is σ = 71383680000. Its totient is φ = 6085804032.

The previous prime is 23111685911. The next prime is 23111685931. The reversal of 23111685912 is 21958611132.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23111685911) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 51473464 + ... + 51473912.

It is an arithmetic number, because the mean of its divisors is an integer number (278842500).

Almost surely, 2^23111685912 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 23111685912, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35691840000).

23111685912 is an abundant number, since it is smaller than the sum of its proper divisors (48271994088).

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

23111685912 is a wasteful number, since it uses less digits than its factorization.

23111685912 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 818 (or 814 counting only the distinct ones).

The product of its digits is 25920, while the sum is 39.

The spelling of 23111685912 in words is "twenty-three billion, one hundred eleven million, six hundred eighty-five thousand, nine hundred twelve".