23720871 has 4 divisors (see below), whose sum is σ = 31627832. Its totient is φ = 15813912.

The previous prime is 23720861. The next prime is 23720909. The reversal of 23720871 is 17802732.

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

It is not a de Polignac number, because 23720871 - 2¹¹ = 23718823 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 (23720861) 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, 3953476 + ... + 3953481.

It is an arithmetic number, because the mean of its divisors is an integer number (7906958).

Almost surely, 2^23720871 is an apocalyptic number.

23720871 is a deficient number, since it is larger than the sum of its proper divisors (7906961).

23720871 is an equidigital number, since it uses as much as digits as its factorization.

23720871 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7906960.

The product of its (nonzero) digits is 4704, while the sum is 30.

The square root of 23720871 is about 4870.4076831411. The cubic root of 23720871 is about 287.3272903459.

The spelling of 23720871 in words is "twenty-three million, seven hundred twenty thousand, eight hundred seventy-one".