20321055523459 has 2 divisors, whose sum is σ = 20321055523460. Its totient is φ = 20321055523458.

The previous prime is 20321055523429. The next prime is 20321055523537. The reversal of 20321055523459 is 95432555012302.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20321055523459 - 2⁹ = 20321055522947 is a prime.

It is not a weakly prime, because it can be changed into another prime (20321055523429) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10160527761729 + 10160527761730.

It is an arithmetic number, because the mean of its divisors is an integer number (10160527761730).

Almost surely, 2^{20321055523459} is an apocalyptic number.

20321055523459 is a deficient number, since it is larger than the sum of its proper divisors (1).

20321055523459 is an equidigital number, since it uses as much as digits as its factorization.

20321055523459 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1620000, while the sum is 46.

The spelling of 20321055523459 in words is "twenty trillion, three hundred twenty-one billion, fifty-five million, five hundred twenty-three thousand, four hundred fifty-nine".