20516533061 has 2 divisors, whose sum is σ = 20516533062. Its totient is φ = 20516533060.

The previous prime is 20516533049. The next prime is 20516533069. The reversal of 20516533061 is 16033561502.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 12058236100 + 8458296961 = 109810^2 + 91969^2 .

It is a cyclic number.

It is not a de Polignac number, because 20516533061 - 2¹⁰ = 20516532037 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20516533069) 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, 10258266530 + 10258266531.

It is an arithmetic number, because the mean of its divisors is an integer number (10258266531).

Almost surely, 2^20516533061 is an apocalyptic number.

It is an amenable number.

20516533061 is a deficient number, since it is larger than the sum of its proper divisors (1).

20516533061 is an equidigital number, since it uses as much as digits as its factorization.

20516533061 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 16200, while the sum is 32.

The spelling of 20516533061 in words is "twenty billion, five hundred sixteen million, five hundred thirty-three thousand, sixty-one".