23009564 has 24 divisors (see below), whose sum is σ = 42016128. Its totient is φ = 11013120.

The previous prime is 23009521. The next prime is 23009611. The reversal of 23009564 is 46590032.

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 7 ways as a sum of consecutive naturals, for example, 11072 + ... + 12984.

It is an arithmetic number, because the mean of its divisors is an integer number (1750672).

Almost surely, 2^23009564 is an apocalyptic number.

It is an amenable number.

23009564 is a deficient number, since it is larger than the sum of its proper divisors (19006564).

23009564 is a wasteful number, since it uses less digits than its factorization.

23009564 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2045 (or 2043 counting only the distinct ones).

The product of its (nonzero) digits is 6480, while the sum is 29.

The square root of 23009564 is about 4796.8285356056. The cubic root of 23009564 is about 284.4261109919.

Adding to 23009564 its reverse (46590032), we get a palindrome (69599596).

The spelling of 23009564 in words is "twenty-three million, nine thousand, five hundred sixty-four".