23665220423 has 16 divisors (see below), whose sum is σ = 26836128480. Its totient is φ = 20688027264.

The previous prime is 23665220351. The next prime is 23665220437. The reversal of 23665220423 is 32402256632.

It is a cyclic number.

It is not a de Polignac number, because 23665220423 - 2⁸ = 23665220167 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23665220483) 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 15 ways as a sum of consecutive naturals, for example, 788765 + ... + 818217.

It is an arithmetic number, because the mean of its divisors is an integer number (1677258030).

Almost surely, 2^23665220423 is an apocalyptic number.

23665220423 is a deficient number, since it is larger than the sum of its proper divisors (3170908057).

23665220423 is a wasteful number, since it uses less digits than its factorization.

23665220423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32738.

The product of its (nonzero) digits is 103680, while the sum is 35.

The spelling of 23665220423 in words is "twenty-three billion, six hundred sixty-five million, two hundred twenty thousand, four hundred twenty-three".