20201089 has 2 divisors, whose sum is σ = 20201090. Its totient is φ = 20201088.

The previous prime is 20201063. The next prime is 20201101. The reversal of 20201089 is 98010202.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 18147600 + 2053489 = 4260^2 + 1433^2 .

It is a cyclic number.

It is not a de Polignac number, because 20201089 - 2¹¹ = 20199041 is a prime.

It is not a weakly prime, because it can be changed into another prime (20201029) 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, 10100544 + 10100545.

It is an arithmetic number, because the mean of its divisors is an integer number (10100545).

Almost surely, 2^20201089 is an apocalyptic number.

It is an amenable number.

20201089 is a deficient number, since it is larger than the sum of its proper divisors (1).

20201089 is an equidigital number, since it uses as much as digits as its factorization.

20201089 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 288, while the sum is 22.

The square root of 20201089 is about 4494.5621588760. The cubic root of 20201089 is about 272.3484621638.

The spelling of 20201089 in words is "twenty million, two hundred one thousand, eighty-nine".