23311322320 has 160 divisors (see below), whose sum is σ = 64084648320. Its totient is φ = 7774341120.

The previous prime is 23311322303. The next prime is 23311322339. The reversal of 23311322320 is 2322311332.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is a junction number, because it is equal to n+sod(n) for n = 23311322291 and 23311322300.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1789591 + ... + 1802569.

It is an arithmetic number, because the mean of its divisors is an integer number (400529052).

Almost surely, 2^23311322320 is an apocalyptic number.

23311322320 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 23311322320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32042324160).

23311322320 is an abundant number, since it is smaller than the sum of its proper divisors (40773326000).

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

23311322320 is a wasteful number, since it uses less digits than its factorization.

23311322320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13173 (or 13167 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 22.

Adding to 23311322320 its reverse (2322311332), we get a palindrome (25633633652).

The spelling of 23311322320 in words is "twenty-three billion, three hundred eleven million, three hundred twenty-two thousand, three hundred twenty".