23320665 has 12 divisors (see below), whose sum is σ = 40422564. Its totient is φ = 12437664.

The previous prime is 23320613. The next prime is 23320667. The reversal of 23320665 is 56602332.

It can be written as a sum of positive squares in 2 ways, for example, as 7733961 + 15586704 = 2781^2 + 3948^2 .

It is not a de Polignac number, because 23320665 - 2⁷ = 23320537 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23320667) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 259074 + ... + 259163.

It is an arithmetic number, because the mean of its divisors is an integer number (3368547).

Almost surely, 2^23320665 is an apocalyptic number.

It is an amenable number.

23320665 is a deficient number, since it is larger than the sum of its proper divisors (17101899).

23320665 is a wasteful number, since it uses less digits than its factorization.

23320665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 518248 (or 518245 counting only the distinct ones).

The product of its (nonzero) digits is 6480, while the sum is 27.

The square root of 23320665 is about 4829.1474402838. The cubic root of 23320665 is about 285.7022387182.

Adding to 23320665 its reverse (56602332), we get a palindrome (79922997).

The spelling of 23320665 in words is "twenty-three million, three hundred twenty thousand, six hundred sixty-five".