23320445 has 4 divisors (see below), whose sum is σ = 27984540. Its totient is φ = 18656352.

The previous prime is 23320439. The next prime is 23320469. The reversal of 23320445 is 54402332.

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 10374841 + 12945604 = 3221^2 + 3598^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-23320445 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 23320445.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2332040 + ... + 2332049.

It is an arithmetic number, because the mean of its divisors is an integer number (6996135).

Almost surely, 2^23320445 is an apocalyptic number.

It is an amenable number.

23320445 is a deficient number, since it is larger than the sum of its proper divisors (4664095).

23320445 is an equidigital number, since it uses as much as digits as its factorization.

23320445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4664094.

The product of its (nonzero) digits is 2880, while the sum is 23.

The square root of 23320445 is about 4829.1246618823. The cubic root of 23320445 is about 285.7013403063.

Adding to 23320445 its reverse (54402332), we get a palindrome (77722777).

The spelling of 23320445 in words is "twenty-three million, three hundred twenty thousand, four hundred forty-five".