20420410204163 has 2 divisors, whose sum is σ = 20420410204164. Its totient is φ = 20420410204162.

The previous prime is 20420410204039. The next prime is 20420410204177. The reversal of 20420410204163 is 36140201402402.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20420410204163 - 2¹² = 20420410200067 is a prime.

It is not a weakly prime, because it can be changed into another prime (20420410254163) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10210205102081 + 10210205102082.

It is an arithmetic number, because the mean of its divisors is an integer number (10210205102082).

Almost surely, 2^{20420410204163} is an apocalyptic number.

20420410204163 is a deficient number, since it is larger than the sum of its proper divisors (1).

20420410204163 is an equidigital number, since it uses as much as digits as its factorization.

20420410204163 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 9216, while the sum is 29.

Adding to 20420410204163 its reverse (36140201402402), we get a palindrome (56560611606565).

The spelling of 20420410204163 in words is "twenty trillion, four hundred twenty billion, four hundred ten million, two hundred four thousand, one hundred sixty-three".