23212320 has 96 divisors (see below), whose sum is σ = 75152448. Its totient is φ = 6018048.

The previous prime is 23212297. The next prime is 23212331. The reversal of 23212320 is 2321232.

It is a tau number, because it is divible by the number of its divisors (96).

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 23212320.

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, 17107 + ... + 18413.

It is an arithmetic number, because the mean of its divisors is an integer number (782838).

Almost surely, 2^23212320 is an apocalyptic number.

23212320 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 23212320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (37576224).

23212320 is an abundant number, since it is smaller than the sum of its proper divisors (51940128).

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

23212320 is a wasteful number, since it uses less digits than its factorization.

23212320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1362 (or 1354 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 15.

The square root of 23212320 is about 4817.9165621667. The cubic root of 23212320 is about 285.2591057003.

Adding to 23212320 its reverse (2321232), we get a palindrome (25533552).

It can be divided in two parts, 23212 and 320, that added together give a palindrome (23532).

The spelling of 23212320 in words is "twenty-three million, two hundred twelve thousand, three hundred twenty".