23923171805 has 16 divisors (see below), whose sum is σ = 31189702320. Its totient is φ = 17509997568.

The previous prime is 23923171801. The next prime is 23923171837. The reversal of 23923171805 is 50817132932.

It can be written as a sum of positive squares in 8 ways, for example, as 5831307769 + 18091864036 = 76363^2 + 134506^2 .

It is a cyclic number.

It is not a de Polignac number, because 23923171805 - 2² = 23923171801 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23923171801) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1621190 + ... + 1635879.

It is an arithmetic number, because the mean of its divisors is an integer number (1949356395).

Almost surely, 2^23923171805 is an apocalyptic number.

It is an amenable number.

23923171805 is a deficient number, since it is larger than the sum of its proper divisors (7266530515).

23923171805 is a wasteful number, since it uses less digits than its factorization.

23923171805 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3257200.

The product of its (nonzero) digits is 90720, while the sum is 41.

The spelling of 23923171805 in words is "twenty-three billion, nine hundred twenty-three million, one hundred seventy-one thousand, eight hundred five".