23936563813 has 4 divisors (see below), whose sum is σ = 23941444780. Its totient is φ = 23931682848.

The previous prime is 23936563811. The next prime is 23936563823. The reversal of 23936563813 is 31836563932.

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

It can be written as a sum of positive squares in 2 ways, for example, as 19159265889 + 4777297924 = 138417^2 + 69118^2 .

It is a cyclic number.

It is not a de Polignac number, because 23936563813 - 2¹ = 23936563811 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 (23936563811) 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, 2433120 + ... + 2442937.

It is an arithmetic number, because the mean of its divisors is an integer number (5985361195).

Almost surely, 2^23936563813 is an apocalyptic number.

It is an amenable number.

23936563813 is a deficient number, since it is larger than the sum of its proper divisors (4880967).

23936563813 is an equidigital number, since it uses as much as digits as its factorization.

23936563813 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4880966.

The product of its digits is 2099520, while the sum is 49.

The spelling of 23936563813 in words is "twenty-three billion, nine hundred thirty-six million, five hundred sixty-three thousand, eight hundred thirteen".