20200289 has 2 divisors, whose sum is σ = 20200290. Its totient is φ = 20200288.

The previous prime is 20200259. The next prime is 20200309. The reversal of 20200289 is 98200202.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 15936064 + 4264225 = 3992^2 + 2065^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20200289 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (20200259) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10100144 + 10100145.

It is an arithmetic number, because the mean of its divisors is an integer number (10100145).

Almost surely, 2^20200289 is an apocalyptic number.

It is an amenable number.

20200289 is a deficient number, since it is larger than the sum of its proper divisors (1).

20200289 is an equidigital number, since it uses as much as digits as its factorization.

20200289 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 576, while the sum is 23.

The square root of 20200289 is about 4494.4731615619. The cubic root of 20200289 is about 272.3448669509.

The spelling of 20200289 in words is "twenty million, two hundred thousand, two hundred eighty-nine".