23645881 has 6 divisors (see below), whose sum is σ = 27506490. Its totient is φ = 20267856.

The previous prime is 23645879. The next prime is 23645891. The reversal of 23645881 is 18854632.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 14288400 + 9357481 = 3780^2 + 3059^2 .

It is not a de Polignac number, because 23645881 - 2¹ = 23645879 is a prime.

It is a super-2 number, since 2×23645881² = 1118255376532322, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 23645881.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23645801) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 241236 + ... + 241333.

It is an arithmetic number, because the mean of its divisors is an integer number (4584415).

Almost surely, 2^23645881 is an apocalyptic number.

It is an amenable number.

23645881 is a deficient number, since it is larger than the sum of its proper divisors (3860609).

23645881 is an equidigital number, since it uses as much as digits as its factorization.

23645881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 482583 (or 482576 counting only the distinct ones).

The product of its digits is 46080, while the sum is 37.

The square root of 23645881 is about 4862.7030548862. The cubic root of 23645881 is about 287.0241899103.

The spelling of 23645881 in words is "twenty-three million, six hundred forty-five thousand, eight hundred eighty-one".