23205305243173 has 2 divisors, whose sum is σ = 23205305243174. Its totient is φ = 23205305243172.

The previous prime is 23205305243171. The next prime is 23205305243191. The reversal of 23205305243173 is 37134250350232.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 21294145535364 + 1911159707809 = 4614558^2 + 1382447^2 .

It is a cyclic number.

It is not a de Polignac number, because 23205305243173 - 2¹ = 23205305243171 is a prime.

Together with 23205305243171, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (23205305243171) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11602652621586 + 11602652621587.

It is an arithmetic number, because the mean of its divisors is an integer number (11602652621587).

Almost surely, 2^{23205305243173} is an apocalyptic number.

It is an amenable number.

23205305243173 is a deficient number, since it is larger than the sum of its proper divisors (1).

23205305243173 is an equidigital number, since it uses as much as digits as its factorization.

23205305243173 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 453600, while the sum is 40.

The spelling of 23205305243173 in words is "twenty-three trillion, two hundred five billion, three hundred five million, two hundred forty-three thousand, one hundred seventy-three".