20289017 has 16 divisors (see below), whose sum is σ = 24729600. Its totient is φ = 16258320.

The previous prime is 20289011. The next prime is 20289023. The reversal of 20289017 is 71098202.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (20289011) and next prime (20289023).

It is a cyclic number.

It is not a de Polignac number, because 20289017 - 2⁸ = 20288761 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20289011) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9542 + ... + 11472.

It is an arithmetic number, because the mean of its divisors is an integer number (1545600).

Almost surely, 2^20289017 is an apocalyptic number.

It is an amenable number.

20289017 is a deficient number, since it is larger than the sum of its proper divisors (4440583).

20289017 is a wasteful number, since it uses less digits than its factorization.

20289017 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2036.

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

The square root of 20289017 is about 4504.3331359925. Note that the first 3 decimals coincide. The cubic root of 20289017 is about 272.7430348702.

The spelling of 20289017 in words is "twenty million, two hundred eighty-nine thousand, seventeen".