23320566 has 36 divisors (see below), whose sum is σ = 53686932. Its totient is φ = 7314624.

The previous prime is 23320547. The next prime is 23320567. The reversal of 23320566 is 66502332.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23320567) by changing a digit.

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 17 ways as a sum of consecutive naturals, for example, 2961 + ... + 7443.

Almost surely, 2^23320566 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 23320566, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26843466).

23320566 is an abundant number, since it is smaller than the sum of its proper divisors (30366366).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

23320566 is a wasteful number, since it uses less digits than its factorization.

23320566 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4525 (or 4505 counting only the distinct ones).

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

The square root of 23320566 is about 4829.1371900165. The cubic root of 23320566 is about 285.7018344336.

Adding to 23320566 its reverse (66502332), we get a palindrome (89822898).

The spelling of 23320566 in words is "twenty-three million, three hundred twenty thousand, five hundred sixty-six".