20017017 has 16 divisors (see below), whose sum is σ = 29964480. Its totient is φ = 13205376.

The previous prime is 20017009. The next prime is 20017031. The reversal of 20017017 is 71071002.

It is not a de Polignac number, because 20017017 - 2³ = 20017009 is a prime.

It is a super-3 number, since 3×20017017³ (a number of 23 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (20017117) 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, 1203 + ... + 6440.

It is an arithmetic number, because the mean of its divisors is an integer number (1872780).

Almost surely, 2^20017017 is an apocalyptic number.

20017017 is a gapful number since it is divisible by the number (27) formed by its first and last digit.

It is an amenable number.

20017017 is a deficient number, since it is larger than the sum of its proper divisors (9947463).

20017017 is an equidigital number, since it uses as much as digits as its factorization.

20017017 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7749 (or 7743 counting only the distinct ones).

The product of its (nonzero) digits is 98, while the sum is 18.

The square root of 20017017 is about 4474.0381089124. The cubic root of 20017017 is about 271.5187252431.

Adding to 20017017 its reverse (71071002), we get a palindrome (91088019).

The spelling of 20017017 in words is "twenty million, seventeen thousand, seventeen".