20764533511 has 2 divisors, whose sum is σ = 20764533512. Its totient is φ = 20764533510.

The previous prime is 20764533457. The next prime is 20764533521. The reversal of 20764533511 is 11533546702.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20764533511 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20764533521) 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, 10382266755 + 10382266756.

It is an arithmetic number, because the mean of its divisors is an integer number (10382266756).

Almost surely, 2^20764533511 is an apocalyptic number.

20764533511 is a deficient number, since it is larger than the sum of its proper divisors (1).

20764533511 is an equidigital number, since it uses as much as digits as its factorization.

20764533511 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 75600, while the sum is 37.

The spelling of 20764533511 in words is "twenty billion, seven hundred sixty-four million, five hundred thirty-three thousand, five hundred eleven".