20363163577 has 2 divisors, whose sum is σ = 20363163578. Its totient is φ = 20363163576.

The previous prime is 20363163563. The next prime is 20363163637. The reversal of 20363163577 is 77536136302.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 14844010896 + 5519152681 = 121836^2 + 74291^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20363163577 is a prime.

It is not a weakly prime, because it can be changed into another prime (20363103577) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10181581788 + 10181581789.

It is an arithmetic number, because the mean of its divisors is an integer number (10181581789).

Almost surely, 2^20363163577 is an apocalyptic number.

It is an amenable number.

20363163577 is a deficient number, since it is larger than the sum of its proper divisors (1).

20363163577 is an equidigital number, since it uses as much as digits as its factorization.

20363163577 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 476280, while the sum is 43.

Adding to 20363163577 its reverse (77536136302), we get a palindrome (97899299879).

It can be divided in two parts, 2036 and 3163577, that added together give a palindrome (3165613).

The spelling of 20363163577 in words is "twenty billion, three hundred sixty-three million, one hundred sixty-three thousand, five hundred seventy-seven".