20682842867 has 2 divisors, whose sum is σ = 20682842868. Its totient is φ = 20682842866.

The previous prime is 20682842857. The next prime is 20682842893. The reversal of 20682842867 is 76824828602.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20682842867 - 2¹⁰ = 20682841843 is a prime.

It is a super-2 number, since 2×20682842867² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (20682842857) 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, 10341421433 + 10341421434.

It is an arithmetic number, because the mean of its divisors is an integer number (10341421434).

Almost surely, 2^20682842867 is an apocalyptic number.

20682842867 is a deficient number, since it is larger than the sum of its proper divisors (1).

20682842867 is an equidigital number, since it uses as much as digits as its factorization.

20682842867 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4128768, while the sum is 53.

The spelling of 20682842867 in words is "twenty billion, six hundred eighty-two million, eight hundred forty-two thousand, eight hundred sixty-seven".