20310110077 has 2 divisors, whose sum is σ = 20310110078. Its totient is φ = 20310110076.

The previous prime is 20310109993. The next prime is 20310110081. The reversal of 20310110077 is 77001101302.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 19683809401 + 626300676 = 140299^2 + 25026^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20310110077 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20310110087) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10155055038 + 10155055039.

It is an arithmetic number, because the mean of its divisors is an integer number (10155055039).

Almost surely, 2^20310110077 is an apocalyptic number.

It is an amenable number.

20310110077 is a deficient number, since it is larger than the sum of its proper divisors (1).

20310110077 is an equidigital number, since it uses as much as digits as its factorization.

20310110077 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 294, while the sum is 22.

Adding to 20310110077 its reverse (77001101302), we get a palindrome (97311211379).

The spelling of 20310110077 in words is "twenty billion, three hundred ten million, one hundred ten thousand, seventy-seven".