23116645 has 4 divisors (see below), whose sum is σ = 27739980. Its totient is φ = 18493312.

The previous prime is 23116637. The next prime is 23116657. The reversal of 23116645 is 54661132.

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

It can be written as a sum of positive squares in 2 ways, for example, as 11840481 + 11276164 = 3441^2 + 3358^2 .

It is a cyclic number.

It is not a de Polignac number, because 23116645 - 2³ = 23116637 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2311660 + ... + 2311669.

It is an arithmetic number, because the mean of its divisors is an integer number (6934995).

Almost surely, 2^23116645 is an apocalyptic number.

It is an amenable number.

23116645 is a deficient number, since it is larger than the sum of its proper divisors (4623335).

23116645 is an equidigital number, since it uses as much as digits as its factorization.

23116645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4623334.

The product of its digits is 4320, while the sum is 28.

The square root of 23116645 is about 4807.9772254036. The cubic root of 23116645 is about 284.8666453165.

Adding to 23116645 its reverse (54661132), we get a palindrome (77777777).

The spelling of 23116645 in words is "twenty-three million, one hundred sixteen thousand, six hundred forty-five".