20340016511 has 2 divisors, whose sum is σ = 20340016512. Its totient is φ = 20340016510.

The previous prime is 20340016471. The next prime is 20340016513. The reversal of 20340016511 is 11561004302.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20340016511 - 2²⁶ = 20272907647 is a prime.

It is a super-2 number, since 2×20340016511² (a number of 21 digits) contains 22 as substring.

Together with 20340016513, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20340016513) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10170008255 + 10170008256.

It is an arithmetic number, because the mean of its divisors is an integer number (10170008256).

Almost surely, 2^20340016511 is an apocalyptic number.

20340016511 is a deficient number, since it is larger than the sum of its proper divisors (1).

20340016511 is an equidigital number, since it uses as much as digits as its factorization.

20340016511 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 720, while the sum is 23.

The spelling of 20340016511 in words is "twenty billion, three hundred forty million, sixteen thousand, five hundred eleven".