23724746861 has 4 divisors (see below), whose sum is σ = 23883973500. Its totient is φ = 23565520224.

The previous prime is 23724746807. The next prime is 23724746893. The reversal of 23724746861 is 16864742732.

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 14694045961 + 9030700900 = 121219^2 + 95030^2 .

It is a cyclic number.

It is not a de Polignac number, because 23724746861 - 2¹⁸ = 23724484717 is a prime.

It is a super-2 number, since 2×23724746861² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23724745861) 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 3 ways as a sum of consecutive naturals, for example, 79613096 + ... + 79613393.

It is an arithmetic number, because the mean of its divisors is an integer number (5970993375).

Almost surely, 2^23724746861 is an apocalyptic number.

It is an amenable number.

23724746861 is a deficient number, since it is larger than the sum of its proper divisors (159226639).

23724746861 is a wasteful number, since it uses less digits than its factorization.

23724746861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 159226638.

The product of its digits is 2709504, while the sum is 50.

The spelling of 23724746861 in words is "twenty-three billion, seven hundred twenty-four million, seven hundred forty-six thousand, eight hundred sixty-one".