20558089 has 2 divisors, whose sum is σ = 20558090. Its totient is φ = 20558088.

The previous prime is 20558077. The next prime is 20558119. The reversal of 20558089 is 98085502.

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., 20548089 + 10000 = 4533^2 + 100^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20558089 is a prime.

It is not a weakly prime, because it can be changed into another prime (20558009) 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, 10279044 + 10279045.

It is an arithmetic number, because the mean of its divisors is an integer number (10279045).

Almost surely, 2^20558089 is an apocalyptic number.

It is an amenable number.

20558089 is a deficient number, since it is larger than the sum of its proper divisors (1).

20558089 is an equidigital number, since it uses as much as digits as its factorization.

20558089 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 28800, while the sum is 37.

The square root of 20558089 is about 4534.1028881136. The cubic root of 20558089 is about 273.9434456244.

The spelling of 20558089 in words is "twenty million, five hundred fifty-eight thousand, eighty-nine".