19865060459 has 2 divisors, whose sum is σ = 19865060460. Its totient is φ = 19865060458.

The previous prime is 19865060441. The next prime is 19865060461. The reversal of 19865060459 is 95406056891.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-19865060459 is a prime.

Together with 19865060461, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 19865060459.

It is not a weakly prime, because it can be changed into another prime (19865030459) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9932530229 + 9932530230.

It is an arithmetic number, because the mean of its divisors is an integer number (9932530230).

Almost surely, 2^19865060459 is an apocalyptic number.

19865060459 is a deficient number, since it is larger than the sum of its proper divisors (1).

19865060459 is an equidigital number, since it uses as much as digits as its factorization.

19865060459 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2332800, while the sum is 53.

The spelling of 19865060459 in words is "nineteen billion, eight hundred sixty-five million, sixty thousand, four hundred fifty-nine".