23308645 has 4 divisors (see below), whose sum is σ = 27970380. Its totient is φ = 18646912.

The previous prime is 23308643. The next prime is 23308651. The reversal of 23308645 is 54680332.

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 17048641 + 6260004 = 4129^2 + 2502^2 .

It is a cyclic number.

It is not a de Polignac number, because 23308645 - 2¹ = 23308643 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23308643) 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 3 ways as a sum of consecutive naturals, for example, 2330860 + ... + 2330869.

It is an arithmetic number, because the mean of its divisors is an integer number (6992595).

Almost surely, 2^23308645 is an apocalyptic number.

It is an amenable number.

23308645 is a deficient number, since it is larger than the sum of its proper divisors (4661735).

23308645 is an equidigital number, since it uses as much as digits as its factorization.

23308645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4661734.

The product of its (nonzero) digits is 17280, while the sum is 31.

The square root of 23308645 is about 4827.9027537845. The cubic root of 23308645 is about 285.6531444766.

Adding to 23308645 its reverse (54680332), we get a palindrome (77988977).

The spelling of 23308645 in words is "twenty-three million, three hundred eight thousand, six hundred forty-five".