20217413633 has 2 divisors, whose sum is σ = 20217413634. Its totient is φ = 20217413632.

The previous prime is 20217413627. The next prime is 20217413647. The reversal of 20217413633 is 33631471202.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 14856684544 + 5360729089 = 121888^2 + 73217^2 .

It is a cyclic number.

It is not a de Polignac number, because 20217413633 - 2²⁸ = 19948978177 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20217413633.

It is not a weakly prime, because it can be changed into another prime (20217413653) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10108706816 + 10108706817.

It is an arithmetic number, because the mean of its divisors is an integer number (10108706817).

Almost surely, 2^20217413633 is an apocalyptic number.

It is an amenable number.

20217413633 is a deficient number, since it is larger than the sum of its proper divisors (1).

20217413633 is an equidigital number, since it uses as much as digits as its factorization.

20217413633 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 18144, while the sum is 32.

Adding to 20217413633 its reverse (33631471202), we get a palindrome (53848884835).

The spelling of 20217413633 in words is "twenty billion, two hundred seventeen million, four hundred thirteen thousand, six hundred thirty-three".