23943391663 has 4 divisors (see below), whose sum is σ = 24715759168. Its totient is φ = 23171024160.

The previous prime is 23943391657. The next prime is 23943391669. The reversal of 23943391663 is 36619334932.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (23943391657) and next prime (23943391669).

It is a cyclic number.

It is not a de Polignac number, because 23943391663 - 2⁵ = 23943391631 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 (23943391669) 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, 386183706 + ... + 386183767.

It is an arithmetic number, because the mean of its divisors is an integer number (6178939792).

Almost surely, 2^23943391663 is an apocalyptic number.

23943391663 is a deficient number, since it is larger than the sum of its proper divisors (772367505).

23943391663 is an equidigital number, since it uses as much as digits as its factorization.

23943391663 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 772367504.

The product of its digits is 1889568, while the sum is 49.

The spelling of 23943391663 in words is "twenty-three billion, nine hundred forty-three million, three hundred ninety-one thousand, six hundred sixty-three".