19896550859 has 2 divisors, whose sum is σ = 19896550860. Its totient is φ = 19896550858.

The previous prime is 19896550819. The next prime is 19896550871. The reversal of 19896550859 is 95805569891.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 19896550859 - 2²⁰ = 19895502283 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 19896550795 and 19896550804.

It is not a weakly prime, because it can be changed into another prime (19896550819) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9948275429 + 9948275430.

It is an arithmetic number, because the mean of its divisors is an integer number (9948275430).

Almost surely, 2^19896550859 is an apocalyptic number.

19896550859 is a deficient number, since it is larger than the sum of its proper divisors (1).

19896550859 is an equidigital number, since it uses as much as digits as its factorization.

19896550859 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 34992000, while the sum is 65.

The spelling of 19896550859 in words is "nineteen billion, eight hundred ninety-six million, five hundred fifty thousand, eight hundred fifty-nine".