20027017 has 4 divisors (see below), whose sum is σ = 20037780. Its totient is φ = 20016256.

The previous prime is 20026991. The next prime is 20027069. The reversal of 20027017 is 71072002.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 6031936 + 13995081 = 2456^2 + 3741^2 .

It is a cyclic number.

It is not a de Polignac number, because 20027017 - 2⁷ = 20026889 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20026985 and 20027003.

It is not an unprimeable number, because it can be changed into a prime (20027087) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1792 + ... + 6577.

It is an arithmetic number, because the mean of its divisors is an integer number (5009445).

Almost surely, 2^20027017 is an apocalyptic number.

It is an amenable number.

20027017 is a deficient number, since it is larger than the sum of its proper divisors (10763).

20027017 is an equidigital number, since it uses as much as digits as its factorization.

20027017 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10762.

The product of its (nonzero) digits is 196, while the sum is 19.

The square root of 20027017 is about 4475.1555280236. The cubic root of 20027017 is about 271.5639323658.

Adding to 20027017 its reverse (71072002), we get a palindrome (91099019).

The spelling of 20027017 in words is "twenty million, twenty-seven thousand, seventeen".