20338388533 has 2 divisors, whose sum is σ = 20338388534. Its totient is φ = 20338388532.

The previous prime is 20338388527. The next prime is 20338388563. The reversal of 20338388533 is 33588383302.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 19958060529 + 380328004 = 141273^2 + 19502^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20338388533 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20338388513) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10169194266 + 10169194267.

It is an arithmetic number, because the mean of its divisors is an integer number (10169194267).

Almost surely, 2^20338388533 is an apocalyptic number.

It is an amenable number.

20338388533 is a deficient number, since it is larger than the sum of its proper divisors (1).

20338388533 is an equidigital number, since it uses as much as digits as its factorization.

20338388533 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1244160, while the sum is 46.

The spelling of 20338388533 in words is "twenty billion, three hundred thirty-eight million, three hundred eighty-eight thousand, five hundred thirty-three".