20635560469 has 2 divisors, whose sum is σ = 20635560470. Its totient is φ = 20635560468.

The previous prime is 20635560397. The next prime is 20635560511. The reversal of 20635560469 is 96406553602.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 19589361444 + 1046199025 = 139962^2 + 32345^2 .

It is a cyclic number.

It is not a de Polignac number, because 20635560469 - 2²³ = 20627171861 is a prime.

It is a super-2 number, since 2×20635560469² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20635570469) 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, 10317780234 + 10317780235.

It is an arithmetic number, because the mean of its divisors is an integer number (10317780235).

Almost surely, 2^20635560469 is an apocalyptic number.

It is an amenable number.

20635560469 is a deficient number, since it is larger than the sum of its proper divisors (1).

20635560469 is an equidigital number, since it uses as much as digits as its factorization.

20635560469 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1166400, while the sum is 46.

The spelling of 20635560469 in words is "twenty billion, six hundred thirty-five million, five hundred sixty thousand, four hundred sixty-nine".