20313120423077 has 2 divisors, whose sum is σ = 20313120423078. Its totient is φ = 20313120423076.

The previous prime is 20313120422983. The next prime is 20313120423103. The reversal of 20313120423077 is 77032402131302.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 20311372430596 + 1747992481 = 4506814^2 + 41809^2 .

It is a cyclic number.

It is not a de Polignac number, because 20313120423077 - 2⁸ = 20313120422821 is a prime.

It is a super-2 number, since 2×20313120423077² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20313120428077) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10156560211538 + 10156560211539.

It is an arithmetic number, because the mean of its divisors is an integer number (10156560211539).

Almost surely, 2^{20313120423077} is an apocalyptic number.

It is an amenable number.

20313120423077 is a deficient number, since it is larger than the sum of its proper divisors (1).

20313120423077 is an equidigital number, since it uses as much as digits as its factorization.

20313120423077 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 42336, while the sum is 35.

Adding to 20313120423077 its reverse (77032402131302), we get a palindrome (97345522554379).

The spelling of 20313120423077 in words is "twenty trillion, three hundred thirteen billion, one hundred twenty million, four hundred twenty-three thousand, seventy-seven".