20050081 has 2 divisors, whose sum is σ = 20050082. Its totient is φ = 20050080.

The previous prime is 20050057. The next prime is 20050097. The reversal of 20050081 is 18005002.

It is a happy number.

It is an a-pointer prime, because the next prime (20050097) can be obtained adding 20050081 to its sum of digits (16).

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11669056 + 8381025 = 3416^2 + 2895^2 .

It is a cyclic number.

It is not a de Polignac number, because 20050081 - 2¹¹ = 20048033 is a prime.

It is a super-2 number, since 2×20050081² = 804011496213122, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (20050031) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10025040 + 10025041.

It is an arithmetic number, because the mean of its divisors is an integer number (10025041).

Almost surely, 2^20050081 is an apocalyptic number.

It is an amenable number.

20050081 is a deficient number, since it is larger than the sum of its proper divisors (1).

20050081 is an equidigital number, since it uses as much as digits as its factorization.

20050081 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 80, while the sum is 16.

The square root of 20050081 is about 4477.7316802149. The cubic root of 20050081 is about 271.6681407241.

Adding to 20050081 its reverse (18005002), we get a palindrome (38055083).

The spelling of 20050081 in words is "twenty million, fifty thousand, eighty-one".