23986815845 has 6 divisors (see below), whose sum is σ = 28784594598. Its totient is φ = 19189175624.

The previous prime is 23986815799. The next prime is 23986815847. The reversal of 23986815845 is 54851868932.

It can be written as a sum of positive squares in only one way, i.e., 19189452676 + 4797363169 = 138526^2 + 69263^2 .

It is not a de Polignac number, because 23986815845 - 2¹⁴ = 23986799461 is a prime.

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 (23986815847) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 311684 + ... + 380946.

It is an arithmetic number, because the mean of its divisors is an integer number (4797432433).

Almost surely, 2^23986815845 is an apocalyptic number.

It is an amenable number.

23986815845 is a deficient number, since it is larger than the sum of its proper divisors (4797778753).

23986815845 is an frugal number, since it uses more digits than its factorization.

23986815845 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 138531 (or 69268 counting only the distinct ones).

The product of its digits is 16588800, while the sum is 59.

The spelling of 23986815845 in words is "twenty-three billion, nine hundred eighty-six million, eight hundred fifteen thousand, eight hundred forty-five".