23166813 has 4 divisors (see below), whose sum is σ = 30889088. Its totient is φ = 15444540.

The previous prime is 23166811. The next prime is 23166821. The reversal of 23166813 is 31866132.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 23166813 - 2¹ = 23166811 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 (23166811) 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, 3861133 + ... + 3861138.

It is an arithmetic number, because the mean of its divisors is an integer number (7722272).

Almost surely, 2^23166813 is an apocalyptic number.

It is an amenable number.

23166813 is a deficient number, since it is larger than the sum of its proper divisors (7722275).

23166813 is an equidigital number, since it uses as much as digits as its factorization.

23166813 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7722274.

The product of its digits is 5184, while the sum is 30.

The square root of 23166813 is about 4813.1915607007. The cubic root of 23166813 is about 285.0725700086.

The spelling of 23166813 in words is "twenty-three million, one hundred sixty-six thousand, eight hundred thirteen".