23720855 has 4 divisors (see below), whose sum is σ = 28465032. Its totient is φ = 18976680.

The previous prime is 23720849. The next prime is 23720857. The reversal of 23720855 is 55802732.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 23720855 - 2⁶ = 23720791 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23720857) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2372081 + ... + 2372090.

It is an arithmetic number, because the mean of its divisors is an integer number (7116258).

Almost surely, 2^23720855 is an apocalyptic number.

23720855 is a deficient number, since it is larger than the sum of its proper divisors (4744177).

23720855 is an equidigital number, since it uses as much as digits as its factorization.

23720855 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4744176.

The product of its (nonzero) digits is 16800, while the sum is 32.

The square root of 23720855 is about 4870.4060405679. The cubic root of 23720855 is about 287.3272257440.

The spelling of 23720855 in words is "twenty-three million, seven hundred twenty thousand, eight hundred fifty-five".