23312400320 has 112 divisors (see below), whose sum is σ = 60632949600. Its totient is φ = 8466923520.

The previous prime is 23312400257. The next prime is 23312400337. The reversal of 23312400320 is 2300421332.

It is a super-2 number, since 2×23312400320² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 23312400292 and 23312400301.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3266516 + ... + 3273644.

Almost surely, 2^23312400320 is an apocalyptic number.

23312400320 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 23312400320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30316474800).

23312400320 is an abundant number, since it is smaller than the sum of its proper divisors (37320549280).

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

23312400320 is a wasteful number, since it uses less digits than its factorization.

23312400320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8086 (or 8076 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 20.

Adding to 23312400320 its reverse (2300421332), we get a palindrome (25612821652).

The spelling of 23312400320 in words is "twenty-three billion, three hundred twelve million, four hundred thousand, three hundred twenty".