20204017 has 2 divisors, whose sum is σ = 20204018. Its totient is φ = 20204016.

The previous prime is 20204003. The next prime is 20204027. The reversal of 20204017 is 71040202.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 16654561 + 3549456 = 4081^2 + 1884^2 .

It is a cyclic number.

It is not a de Polignac number, because 20204017 - 2⁷ = 20203889 is a prime.

It is not a weakly prime, because it can be changed into another prime (20204027) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10102008 + 10102009.

It is an arithmetic number, because the mean of its divisors is an integer number (10102009).

Almost surely, 2^20204017 is an apocalyptic number.

It is an amenable number.

20204017 is a deficient number, since it is larger than the sum of its proper divisors (1).

20204017 is an equidigital number, since it uses as much as digits as its factorization.

20204017 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 112, while the sum is 16.

The square root of 20204017 is about 4494.8878740187. The cubic root of 20204017 is about 272.3616198335.

Adding to 20204017 its reverse (71040202), we get a palindrome (91244219).

The spelling of 20204017 in words is "twenty million, two hundred four thousand, seventeen".