23564 has 12 divisors (see below), whose sum is σ = 42504. Its totient is φ = 11424.

The previous prime is 23563. The next prime is 23567. The reversal of 23564 is 46532.

It is a hoax number, since the sum of its digits (20) coincides with the sum of the digits of its distinct prime factors.

It is a plaindrome in base 12.

It is a nialpdrome in base 14.

It is not an unprimeable number, because it can be changed into a prime (23561) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 104 + ... + 240.

It is an arithmetic number, because the mean of its divisors is an integer number (3542).

2²³⁵⁶⁴ is an apocalyptic number.

It is an amenable number.

23564 is a deficient number, since it is larger than the sum of its proper divisors (18940).

23564 is a wasteful number, since it uses less digits than its factorization.

23564 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 184 (or 182 counting only the distinct ones).

The product of its digits is 720, while the sum is 20.

The square root of 23564 is about 153.5057002199. The cubic root of 23564 is about 28.6692504131.

The spelling of 23564 in words is "twenty-three thousand, five hundred sixty-four".