20363163641 has 2 divisors, whose sum is σ = 20363163642. Its totient is φ = 20363163640.

The previous prime is 20363163637. The next prime is 20363163673. The reversal of 20363163641 is 14636136302.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12338766400 + 8024397241 = 111080^2 + 89579^2 .

It is a cyclic number.

It is not a de Polignac number, because 20363163641 - 2² = 20363163637 is a prime.

It is not a weakly prime, because it can be changed into another prime (20363133641) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10181581820 + 10181581821.

It is an arithmetic number, because the mean of its divisors is an integer number (10181581821).

Almost surely, 2^20363163641 is an apocalyptic number.

It is an amenable number.

20363163641 is a deficient number, since it is larger than the sum of its proper divisors (1).

20363163641 is an equidigital number, since it uses as much as digits as its factorization.

20363163641 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 46656, while the sum is 35.

Adding to 20363163641 its reverse (14636136302), we get a palindrome (34999299943).

The spelling of 20363163641 in words is "twenty billion, three hundred sixty-three million, one hundred sixty-three thousand, six hundred forty-one".