20085089 has 2 divisors, whose sum is σ = 20085090. Its totient is φ = 20085088.

The previous prime is 20085067. The next prime is 20085097. The reversal of 20085089 is 98058002.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 17572864 + 2512225 = 4192^2 + 1585^2 .

It is a cyclic number.

It is not a de Polignac number, because 20085089 - 2¹² = 20080993 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (20085019) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10042544 + 10042545.

It is an arithmetic number, because the mean of its divisors is an integer number (10042545).

Almost surely, 2^20085089 is an apocalyptic number.

It is an amenable number.

20085089 is a deficient number, since it is larger than the sum of its proper divisors (1).

20085089 is an equidigital number, since it uses as much as digits as its factorization.

20085089 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5760, while the sum is 32.

The square root of 20085089 is about 4481.6390974732. The cubic root of 20085089 is about 271.8261621705.

The spelling of 20085089 in words is "twenty million, eighty-five thousand, eighty-nine".