18286782859 has 2 divisors, whose sum is σ = 18286782860. Its totient is φ = 18286782858.

The previous prime is 18286782827. The next prime is 18286782923. The reversal of 18286782859 is 95828768281.

It is an a-pointer prime, because the next prime (18286782923) can be obtained adding 18286782859 to its sum of digits (64).

It is a weak prime.

It is an emirp because it is prime and its reverse (95828768281) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 18286782859 - 2⁵ = 18286782827 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 18286782859.

It is not a weakly prime, because it can be changed into another prime (18286782809) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9143391429 + 9143391430.

It is an arithmetic number, because the mean of its divisors is an integer number (9143391430).

Almost surely, 2^18286782859 is an apocalyptic number.

18286782859 is a deficient number, since it is larger than the sum of its proper divisors (1).

18286782859 is an equidigital number, since it uses as much as digits as its factorization.

18286782859 is an evil number, because the sum of its binary digits is even.

The product of its digits is 30965760, while the sum is 64.

The spelling of 18286782859 in words is "eighteen billion, two hundred eighty-six million, seven hundred eighty-two thousand, eight hundred fifty-nine".