20363163637 has 2 divisors, whose sum is σ = 20363163638. Its totient is φ = 20363163636.

The previous prime is 20363163577. The next prime is 20363163641. The reversal of 20363163637 is 73636136302.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11194909636 + 9168254001 = 105806^2 + 95751^2 .

It is a cyclic number.

It is not a de Polignac number, because 20363163637 - 2²³ = 20354775029 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20363163637.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20363169637) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10181581818 + 10181581819.

It is an arithmetic number, because the mean of its divisors is an integer number (10181581819).

Almost surely, 2^20363163637 is an apocalyptic number.

It is an amenable number.

20363163637 is a deficient number, since it is larger than the sum of its proper divisors (1).

20363163637 is an equidigital number, since it uses as much as digits as its factorization.

20363163637 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 244944, while the sum is 40.

Adding to 20363163637 its reverse (73636136302), we get a palindrome (93999299939).

The spelling of 20363163637 in words is "twenty billion, three hundred sixty-three million, one hundred sixty-three thousand, six hundred thirty-seven".