20089217 has 2 divisors, whose sum is σ = 20089218. Its totient is φ = 20089216.

The previous prime is 20089211. The next prime is 20089219. The reversal of 20089217 is 71298002.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11771761 + 8317456 = 3431^2 + 2884^2 .

It is a cyclic number.

It is not a de Polignac number, because 20089217 - 2²² = 15894913 is a prime.

Together with 20089219, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20089217.

It is not a weakly prime, because it can be changed into another prime (20089211) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10044608 + 10044609.

It is an arithmetic number, because the mean of its divisors is an integer number (10044609).

Almost surely, 2^20089217 is an apocalyptic number.

It is an amenable number.

20089217 is a deficient number, since it is larger than the sum of its proper divisors (1).

20089217 is an equidigital number, since it uses as much as digits as its factorization.

20089217 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2016, while the sum is 29.

The square root of 20089217 is about 4482.0996195979. The cubic root of 20089217 is about 271.8447833067.

The spelling of 20089217 in words is "twenty million, eighty-nine thousand, two hundred seventeen".