20523105077 has 2 divisors, whose sum is σ = 20523105078. Its totient is φ = 20523105076.

The previous prime is 20523105047. The next prime is 20523105079. The reversal of 20523105077 is 77050132502.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 15706606276 + 4816498801 = 125326^2 + 69401^2 .

It is a cyclic number.

It is not a de Polignac number, because 20523105077 - 2¹⁸ = 20522842933 is a prime.

Together with 20523105079, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20523105079) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10261552538 + 10261552539.

It is an arithmetic number, because the mean of its divisors is an integer number (10261552539).

Almost surely, 2^20523105077 is an apocalyptic number.

It is an amenable number.

20523105077 is a deficient number, since it is larger than the sum of its proper divisors (1).

20523105077 is an equidigital number, since it uses as much as digits as its factorization.

20523105077 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 14700, while the sum is 32.

Adding to 20523105077 its reverse (77050132502), we get a palindrome (97573237579).

The spelling of 20523105077 in words is "twenty billion, five hundred twenty-three million, one hundred five thousand, seventy-seven".