23563881 has 12 divisors (see below), whose sum is σ = 37131120. Its totient is φ = 14281080.

The previous prime is 23563879. The next prime is 23563901. The reversal of 23563881 is 18836532.

It is not a de Polignac number, because 23563881 - 2¹ = 23563879 is a prime.

It is a super-2 number, since 2×23563881² = 1110512975564322, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (23563831) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 118911 + ... + 119108.

It is an arithmetic number, because the mean of its divisors is an integer number (3094260).

Almost surely, 2^23563881 is an apocalyptic number.

It is an amenable number.

23563881 is a deficient number, since it is larger than the sum of its proper divisors (13567239).

23563881 is a wasteful number, since it uses less digits than its factorization.

23563881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 238036 (or 238033 counting only the distinct ones).

The product of its digits is 34560, while the sum is 36.

The square root of 23563881 is about 4854.2642078898. The cubic root of 23563881 is about 286.6920215240.

The spelling of 23563881 in words is "twenty-three million, five hundred sixty-three thousand, eight hundred eighty-one".