20953350308089 has 2 divisors, whose sum is σ = 20953350308090. Its totient is φ = 20953350308088.

The previous prime is 20953350308053. The next prime is 20953350308119. The reversal of 20953350308089 is 98080305335902.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 16671844435689 + 4281505872400 = 4083117^2 + 2069180^2 .

It is a cyclic number.

It is not a de Polignac number, because 20953350308089 - 2¹⁵ = 20953350275321 is a prime.

It is not a weakly prime, because it can be changed into another prime (20953350308029) 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, 10476675154044 + 10476675154045.

It is an arithmetic number, because the mean of its divisors is an integer number (10476675154045).

Almost surely, 2^{20953350308089} is an apocalyptic number.

It is an amenable number.

20953350308089 is a deficient number, since it is larger than the sum of its proper divisors (1).

20953350308089 is an equidigital number, since it uses as much as digits as its factorization.

20953350308089 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6998400, while the sum is 55.

The spelling of 20953350308089 in words is "twenty trillion, nine hundred fifty-three billion, three hundred fifty million, three hundred eight thousand, eighty-nine".