20312113273 has 2 divisors, whose sum is σ = 20312113274. Its totient is φ = 20312113272.

The previous prime is 20312113219. The next prime is 20312113321. The reversal of 20312113273 is 37231121302.

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., 18260657424 + 2051455849 = 135132^2 + 45293^2 .

It is a cyclic number.

It is not a de Polignac number, because 20312113273 - 2²⁵ = 20278558841 is a prime.

It is not a weakly prime, because it can be changed into another prime (20312113373) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10156056636 + 10156056637.

It is an arithmetic number, because the mean of its divisors is an integer number (10156056637).

Almost surely, 2^20312113273 is an apocalyptic number.

It is an amenable number.

20312113273 is a deficient number, since it is larger than the sum of its proper divisors (1).

20312113273 is an equidigital number, since it uses as much as digits as its factorization.

20312113273 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1512, while the sum is 25.

Adding to 20312113273 its reverse (37231121302), we get a palindrome (57543234575).

The spelling of 20312113273 in words is "twenty billion, three hundred twelve million, one hundred thirteen thousand, two hundred seventy-three".