20315111413277 has 2 divisors, whose sum is σ = 20315111413278. Its totient is φ = 20315111413276.

The previous prime is 20315111413241. The next prime is 20315111413307. The reversal of 20315111413277 is 77231411151302.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 20312787594841 + 2323818436 = 4506971^2 + 48206^2 .

It is a cyclic number.

It is not a de Polignac number, because 20315111413277 - 2³⁸ = 20040233506333 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20315111413277.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20315111413577) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10157555706638 + 10157555706639.

It is an arithmetic number, because the mean of its divisors is an integer number (10157555706639).

Almost surely, 2^{20315111413277} is an apocalyptic number.

It is an amenable number.

20315111413277 is a deficient number, since it is larger than the sum of its proper divisors (1).

20315111413277 is an equidigital number, since it uses as much as digits as its factorization.

20315111413277 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 35280, while the sum is 38.

Adding to 20315111413277 its reverse (77231411151302), we get a palindrome (97546522564579).

The spelling of 20315111413277 in words is "twenty trillion, three hundred fifteen billion, one hundred eleven million, four hundred thirteen thousand, two hundred seventy-seven".