23355520 has 32 divisors (see below), whose sum is σ = 55835820. Its totient is φ = 9341952.

The previous prime is 23355499. The next prime is 23355523. The reversal of 23355520 is 2555332.

It can be written as a sum of positive squares in 2 ways, for example, as 20286016 + 3069504 = 4504^2 + 1752^2 .

It is a tau number, because it is divible by the number of its divisors (32).

It is not an unprimeable number, because it can be changed into a prime (23355523) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17607 + ... + 18886.

Almost surely, 2^23355520 is an apocalyptic number.

23355520 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

23355520 is an abundant number, since it is smaller than the sum of its proper divisors (32480300).

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

23355520 is an equidigital number, since it uses as much as digits as its factorization.

23355520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36512 (or 36500 counting only the distinct ones).

The product of its (nonzero) digits is 4500, while the sum is 25.

The square root of 23355520 is about 4832.7549079174. The cubic root of 23355520 is about 285.8445044513.

The spelling of 23355520 in words is "twenty-three million, three hundred fifty-five thousand, five hundred twenty".