23043564 has 18 divisors (see below), whose sum is σ = 58249100. Its totient is φ = 7681176.

The previous prime is 23043533. The next prime is 23043569. The reversal of 23043564 is 46534032.

23043564 is a `hidden beast` number, since 2 + 304 + 356 + 4 = 666.

It is a tau number, because it is divible by the number of its divisors (18).

23043564 is a modest number, since divided by 3564 gives 2304 as remainder.

It is not an unprimeable number, because it can be changed into a prime (23043569) 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 5 ways as a sum of consecutive naturals, for example, 320014 + ... + 320085.

Almost surely, 2^23043564 is an apocalyptic number.

It is an amenable number.

23043564 is an abundant number, since it is smaller than the sum of its proper divisors (35205536).

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

23043564 is a wasteful number, since it uses less digits than its factorization.

23043564 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 640109 (or 640104 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 27.

The square root of 23043564 is about 4800.3712356442. The cubic root of 23043564 is about 284.5661357876.

Adding to 23043564 its reverse (46534032), we get a palindrome (69577596).

The spelling of 23043564 in words is "twenty-three million, forty-three thousand, five hundred sixty-four".