20540406163 has 2 divisors, whose sum is σ = 20540406164. Its totient is φ = 20540406162.

The previous prime is 20540406127. The next prime is 20540406169. The reversal of 20540406163 is 36160404502.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20540406163 - 2⁹ = 20540405651 is a prime.

It is a super-3 number, since 3×20540406163³ (a number of 32 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (20540406169) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10270203081 + 10270203082.

It is an arithmetic number, because the mean of its divisors is an integer number (10270203082).

Almost surely, 2^20540406163 is an apocalyptic number.

20540406163 is a deficient number, since it is larger than the sum of its proper divisors (1).

20540406163 is an equidigital number, since it uses as much as digits as its factorization.

20540406163 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 17280, while the sum is 31.

The spelling of 20540406163 in words is "twenty billion, five hundred forty million, four hundred six thousand, one hundred sixty-three".