18945859859 has 2 divisors, whose sum is σ = 18945859860. Its totient is φ = 18945859858.

The previous prime is 18945859841. The next prime is 18945859883. The reversal of 18945859859 is 95895854981.

It is a weak prime.

It is an emirp because it is prime and its reverse (95895854981) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 18945859859 - 2²⁴ = 18929082643 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 18945859792 and 18945859801.

It is not a weakly prime, because it can be changed into another prime (18945859159) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9472929929 + 9472929930.

It is an arithmetic number, because the mean of its divisors is an integer number (9472929930).

Almost surely, 2^18945859859 is an apocalyptic number.

18945859859 is a deficient number, since it is larger than the sum of its proper divisors (1).

18945859859 is an equidigital number, since it uses as much as digits as its factorization.

18945859859 is an evil number, because the sum of its binary digits is even.

The product of its digits is 186624000, while the sum is 71.

The spelling of 18945859859 in words is "eighteen billion, nine hundred forty-five million, eight hundred fifty-nine thousand, eight hundred fifty-nine".