2020818161 has 2 divisors, whose sum is σ = 2020818162. Its totient is φ = 2020818160.

The previous prime is 2020818113. The next prime is 2020818167. The reversal of 2020818161 is 1618180202.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1676493025 + 344325136 = 40945^2 + 18556^2 .

It is a cyclic number.

It is not a de Polignac number, because 2020818161 - 2¹⁰ = 2020817137 is a prime.

It is not a weakly prime, because it can be changed into another prime (2020818167) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1010409080 + 1010409081.

It is an arithmetic number, because the mean of its divisors is an integer number (1010409081).

Almost surely, 2^2020818161 is an apocalyptic number.

It is an amenable number.

2020818161 is a deficient number, since it is larger than the sum of its proper divisors (1).

2020818161 is an equidigital number, since it uses as much as digits as its factorization.

2020818161 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1536, while the sum is 29.

The square root of 2020818161 is about 44953.5111086998. The cubic root of 2020818161 is about 1264.2775089779.

Adding to 2020818161 its reverse (1618180202), we get a palindrome (3638998363).

The spelling of 2020818161 in words is "two billion, twenty million, eight hundred eighteen thousand, one hundred sixty-one".