2020161761 has 2 divisors, whose sum is σ = 2020161762. Its totient is φ = 2020161760.

The previous prime is 2020161749. The next prime is 2020161769. The reversal of 2020161761 is 1671610202.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1514766400 + 505395361 = 38920^2 + 22481^2 .

It is a cyclic number.

It is not a de Polignac number, because 2020161761 - 2²⁶ = 1953052897 is a prime.

It is a super-2 number, since 2×2020161761² = 8162107081213242242, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 2020161761.

It is not a weakly prime, because it can be changed into another prime (2020161769) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1010080880 + 1010080881.

It is an arithmetic number, because the mean of its divisors is an integer number (1010080881).

Almost surely, 2^2020161761 is an apocalyptic number.

It is an amenable number.

2020161761 is a deficient number, since it is larger than the sum of its proper divisors (1).

2020161761 is an equidigital number, since it uses as much as digits as its factorization.

2020161761 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1008, while the sum is 26.

The square root of 2020161761 is about 44946.2096399685. The cubic root of 2020161761 is about 1264.1406070634.

Adding to 2020161761 its reverse (1671610202), we get a palindrome (3691771963).

The spelling of 2020161761 in words is "two billion, twenty million, one hundred sixty-one thousand, seven hundred sixty-one".