20430120017 has 2 divisors, whose sum is σ = 20430120018. Its totient is φ = 20430120016.

The previous prime is 20430119977. The next prime is 20430120019. The reversal of 20430120017 is 71002103402.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 18890028481 + 1540091536 = 137441^2 + 39244^2 .

It is a cyclic number.

It is not a de Polignac number, because 20430120017 - 2⁶ = 20430119953 is a prime.

Together with 20430120019, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (20430120019) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10215060008 + 10215060009.

It is an arithmetic number, because the mean of its divisors is an integer number (10215060009).

Almost surely, 2^20430120017 is an apocalyptic number.

It is an amenable number.

20430120017 is a deficient number, since it is larger than the sum of its proper divisors (1).

20430120017 is an equidigital number, since it uses as much as digits as its factorization.

20430120017 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 336, while the sum is 20.

Adding to 20430120017 its reverse (71002103402), we get a palindrome (91432223419).

The spelling of 20430120017 in words is "twenty billion, four hundred thirty million, one hundred twenty thousand, seventeen".