2013320123173 has 2 divisors, whose sum is σ = 2013320123174. Its totient is φ = 2013320123172.

The previous prime is 2013320123117. The next prime is 2013320123183. The reversal of 2013320123173 is 3713210233102.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1922900835969 + 90419287204 = 1386687^2 + 300698^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2013320123173 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2013320123183) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1006660061586 + 1006660061587.

It is an arithmetic number, because the mean of its divisors is an integer number (1006660061587).

Almost surely, 2^{2013320123173} is an apocalyptic number.

It is an amenable number.

2013320123173 is a deficient number, since it is larger than the sum of its proper divisors (1).

2013320123173 is an equidigital number, since it uses as much as digits as its factorization.

2013320123173 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4536, while the sum is 28.

Adding to 2013320123173 its reverse (3713210233102), we get a palindrome (5726530356275).

The spelling of 2013320123173 in words is "two trillion, thirteen billion, three hundred twenty million, one hundred twenty-three thousand, one hundred seventy-three".