20053101968161 has 2 divisors, whose sum is σ = 20053101968162. Its totient is φ = 20053101968160.

The previous prime is 20053101968093. The next prime is 20053101968219. The reversal of 20053101968161 is 16186910135002.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 15554694275136 + 4498407693025 = 3943944^2 + 2120945^2 .

It is a cyclic number.

It is not a de Polignac number, because 20053101968161 - 2³¹ = 20050954484513 is a prime.

It is not a weakly prime, because it can be changed into another prime (20053101938161) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10026550984080 + 10026550984081.

It is an arithmetic number, because the mean of its divisors is an integer number (10026550984081).

Almost surely, 2^{20053101968161} is an apocalyptic number.

It is an amenable number.

20053101968161 is a deficient number, since it is larger than the sum of its proper divisors (1).

20053101968161 is an equidigital number, since it uses as much as digits as its factorization.

20053101968161 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 77760, while the sum is 43.

The spelling of 20053101968161 in words is "twenty trillion, fifty-three billion, one hundred one million, nine hundred sixty-eight thousand, one hundred sixty-one".