20535943163 has 2 divisors, whose sum is σ = 20535943164. Its totient is φ = 20535943162.

The previous prime is 20535943121. The next prime is 20535943201. The reversal of 20535943163 is 36134953502.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20535943163 - 2³⁴ = 3356073979 is a prime.

It is a Sophie Germain prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20535943163.

It is not a weakly prime, because it can be changed into another prime (20535943063) 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, 10267971581 + 10267971582.

It is an arithmetic number, because the mean of its divisors is an integer number (10267971582).

Almost surely, 2^20535943163 is an apocalyptic number.

20535943163 is a deficient number, since it is larger than the sum of its proper divisors (1).

20535943163 is an equidigital number, since it uses as much as digits as its factorization.

20535943163 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 291600, while the sum is 41.

The spelling of 20535943163 in words is "twenty billion, five hundred thirty-five million, nine hundred forty-three thousand, one hundred sixty-three".