23565920 has 96 divisors (see below), whose sum is σ = 64991808. Its totient is φ = 7907328.

The previous prime is 23565907. The next prime is 23565923. The reversal of 23565920 is 2956532.

It is a Harshad number since it is a multiple of its sum of digits (32).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23565923) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 59162 + ... + 59558.

It is an arithmetic number, because the mean of its divisors is an integer number (676998).

Almost surely, 2^23565920 is an apocalyptic number.

23565920 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 23565920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32495904).

23565920 is an abundant number, since it is smaller than the sum of its proper divisors (41425888).

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

23565920 is a wasteful number, since it uses less digits than its factorization.

23565920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 472 (or 464 counting only the distinct ones).

The product of its (nonzero) digits is 16200, while the sum is 32.

The square root of 23565920 is about 4854.4742248775. The cubic root of 23565920 is about 286.7002905095.

The spelling of 23565920 in words is "twenty-three million, five hundred sixty-five thousand, nine hundred twenty".