20250289 has 2 divisors, whose sum is σ = 20250290. Its totient is φ = 20250288.

The previous prime is 20250287. The next prime is 20250299. The reversal of 20250289 is 98205202.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 20250000 + 289 = 4500^2 + 17^2 .

It is a cyclic number.

It is not a de Polignac number, because 20250289 - 2¹ = 20250287 is a prime.

Together with 20250287, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (20250283) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10125144 + 10125145.

It is an arithmetic number, because the mean of its divisors is an integer number (10125145).

Almost surely, 2^20250289 is an apocalyptic number.

It is an amenable number.

20250289 is a deficient number, since it is larger than the sum of its proper divisors (1).

20250289 is an equidigital number, since it uses as much as digits as its factorization.

20250289 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2880, while the sum is 28.

The square root of 20250289 is about 4500.0321109965. The cubic root of 20250289 is about 272.5693855800.

The spelling of 20250289 in words is "twenty million, two hundred fifty thousand, two hundred eighty-nine".