20060581 has 2 divisors, whose sum is σ = 20060582. Its totient is φ = 20060580.

The previous prime is 20060569. The next prime is 20060591. The reversal of 20060581 is 18506002.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10660225 + 9400356 = 3265^2 + 3066^2 .

It is a cyclic number.

It is not a de Polignac number, because 20060581 - 2¹⁷ = 19929509 is a prime.

It is a super-2 number, since 2×20060581² = 804853820115122, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20060591) 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, 10030290 + 10030291.

It is an arithmetic number, because the mean of its divisors is an integer number (10030291).

Almost surely, 2^20060581 is an apocalyptic number.

It is an amenable number.

20060581 is a deficient number, since it is larger than the sum of its proper divisors (1).

20060581 is an equidigital number, since it uses as much as digits as its factorization.

20060581 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 480, while the sum is 22.

The square root of 20060581 is about 4478.9039953989. The cubic root of 20060581 is about 271.7155556228.

Adding to 20060581 its reverse (18506002), we get a palindrome (38566583).

The spelling of 20060581 in words is "twenty million, sixty thousand, five hundred eighty-one".