20061161 has 2 divisors, whose sum is σ = 20061162. Its totient is φ = 20061160.

The previous prime is 20061137. The next prime is 20061187. The reversal of 20061161 is 16116002.

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., 11323225 + 8737936 = 3365^2 + 2956^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20061161 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (20061191) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10030580 + 10030581.

It is an arithmetic number, because the mean of its divisors is an integer number (10030581).

Almost surely, 2^20061161 is an apocalyptic number.

It is an amenable number.

20061161 is a deficient number, since it is larger than the sum of its proper divisors (1).

20061161 is an equidigital number, since it uses as much as digits as its factorization.

20061161 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 72, while the sum is 17.

The square root of 20061161 is about 4478.9687429139. The cubic root of 20061161 is about 271.7181742492.

Adding to 20061161 its reverse (16116002), we get a palindrome (36177163).

The spelling of 20061161 in words is "twenty million, sixty-one thousand, one hundred sixty-one".