20115061 has 2 divisors, whose sum is σ = 20115062. Its totient is φ = 20115060.

The previous prime is 20115049. The next prime is 20115083. The reversal of 20115061 is 16051102.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 14326225 + 5788836 = 3785^2 + 2406^2 .

It is a cyclic number.

It is not a de Polignac number, because 20115061 - 2¹¹ = 20113013 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20115031) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10057530 + 10057531.

It is an arithmetic number, because the mean of its divisors is an integer number (10057531).

Almost surely, 2^20115061 is an apocalyptic number.

It is an amenable number.

20115061 is a deficient number, since it is larger than the sum of its proper divisors (1).

20115061 is an equidigital number, since it uses as much as digits as its factorization.

20115061 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 60, while the sum is 16.

The square root of 20115061 is about 4484.9817167966. The cubic root of 20115061 is about 271.9613059505.

Adding to 20115061 its reverse (16051102), we get a palindrome (36166163).

The spelling of 20115061 in words is "twenty million, one hundred fifteen thousand, sixty-one".