23481564 has 24 divisors (see below), whose sum is σ = 54906768. Its totient is φ = 7810560.

The previous prime is 23481559. The next prime is 23481581. The reversal of 23481564 is 46518432.

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, 4684 + ... + 8300.

It is an arithmetic number, because the mean of its divisors is an integer number (2287782).

Almost surely, 2^23481564 is an apocalyptic number.

It is an amenable number.

23481564 is an abundant number, since it is smaller than the sum of its proper divisors (31425204).

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

23481564 is a wasteful number, since it uses less digits than its factorization.

23481564 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4165 (or 4163 counting only the distinct ones).

The product of its digits is 23040, while the sum is 33.

The square root of 23481564 is about 4845.7779561181. Note that the first 3 decimals coincide. The cubic root of 23481564 is about 286.3577930322.

Adding to 23481564 its reverse (46518432), we get a palindrome (69999996).

The spelling of 23481564 in words is "twenty-three million, four hundred eighty-one thousand, five hundred sixty-four".