20131313202073 has 2 divisors, whose sum is σ = 20131313202074. Its totient is φ = 20131313202072.

The previous prime is 20131313202061. The next prime is 20131313202103. The reversal of 20131313202073 is 37020231313102.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 18128205144729 + 2003108057344 = 4257723^2 + 1415312^2 .

It is a cyclic number.

It is not a de Polignac number, because 20131313202073 - 2⁹ = 20131313201561 is a prime.

It is not a weakly prime, because it can be changed into another prime (20131313202673) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10065656601036 + 10065656601037.

It is an arithmetic number, because the mean of its divisors is an integer number (10065656601037).

Almost surely, 2^{20131313202073} is an apocalyptic number.

It is an amenable number.

20131313202073 is a deficient number, since it is larger than the sum of its proper divisors (1).

20131313202073 is an equidigital number, since it uses as much as digits as its factorization.

20131313202073 is an odious number, because the sum of its binary digits is odd.

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

Adding to 20131313202073 its reverse (37020231313102), we get a palindrome (57151544515175).

The spelling of 20131313202073 in words is "twenty trillion, one hundred thirty-one billion, three hundred thirteen million, two hundred two thousand, seventy-three".