20684654059 has 2 divisors, whose sum is σ = 20684654060. Its totient is φ = 20684654058.

The previous prime is 20684654047. The next prime is 20684654099. The reversal of 20684654059 is 95045648602.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20684654059 - 2²¹ = 20682556907 is a prime.

It is not a weakly prime, because it can be changed into another prime (20684654099) 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, 10342327029 + 10342327030.

It is an arithmetic number, because the mean of its divisors is an integer number (10342327030).

Almost surely, 2^20684654059 is an apocalyptic number.

20684654059 is a deficient number, since it is larger than the sum of its proper divisors (1).

20684654059 is an equidigital number, since it uses as much as digits as its factorization.

20684654059 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2073600, while the sum is 49.

The spelling of 20684654059 in words is "twenty billion, six hundred eighty-four million, six hundred fifty-four thousand, fifty-nine".