23709205837 has 6 divisors (see below), whose sum is σ = 23727499854. Its totient is φ = 23690925720.

The previous prime is 23709205829. The next prime is 23709205957. The reversal of 23709205837 is 73850290732.

It can be written as a sum of positive squares in only one way, i.e., 21207805641 + 2501400196 = 145629^2 + 50014^2 .

It is not a de Polignac number, because 23709205837 - 2³ = 23709205829 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 (23709205337) 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 5 ways as a sum of consecutive naturals, for example, 2158363 + ... + 2169319.

It is an arithmetic number, because the mean of its divisors is an integer number (3954583309).

Almost surely, 2^23709205837 is an apocalyptic number.

It is an amenable number.

23709205837 is a deficient number, since it is larger than the sum of its proper divisors (18294017).

23709205837 is an frugal number, since it uses more digits than its factorization.

23709205837 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13899 (or 12428 counting only the distinct ones).

The product of its (nonzero) digits is 635040, while the sum is 46.

The spelling of 23709205837 in words is "twenty-three billion, seven hundred nine million, two hundred five thousand, eight hundred thirty-seven".