23111111320 has 320 divisors, whose sum is σ = 63080064000. Its totient is φ = 7589894400.

The previous prime is 23111111311. The next prime is 23111111333. The reversal of 23111111320 is 2311111132.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 23111111294 and 23111111303.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 344941927 + ... + 344941993.

It is an arithmetic number, because the mean of its divisors is an integer number (197125200).

Almost surely, 2^23111111320 is an apocalyptic number.

23111111320 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 23111111320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31540032000).

23111111320 is an abundant number, since it is smaller than the sum of its proper divisors (39968952680).

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

23111111320 is a wasteful number, since it uses less digits than its factorization.

23111111320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 172 (or 135 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 16.

Adding to 23111111320 its reverse (2311111132), we get a palindrome (25422222452).

It can be divided in two parts, 23111 and 111320, that added together give a palindrome (134431).

The spelling of 23111111320 in words is "twenty-three billion, one hundred eleven million, one hundred eleven thousand, three hundred twenty".