18594019663 has 2 divisors, whose sum is σ = 18594019664. Its totient is φ = 18594019662.

The previous prime is 18594019649. The next prime is 18594019669. The reversal of 18594019663 is 36691049581.

It is a strong prime.

It is an emirp because it is prime and its reverse (36691049581) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 18594019663 - 2³³ = 10004085071 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 18594019663.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18594019669) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9297009831 + 9297009832.

It is an arithmetic number, because the mean of its divisors is an integer number (9297009832).

Almost surely, 2^18594019663 is an apocalyptic number.

18594019663 is a deficient number, since it is larger than the sum of its proper divisors (1).

18594019663 is an equidigital number, since it uses as much as digits as its factorization.

18594019663 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1399680, while the sum is 52.

The spelling of 18594019663 in words is "eighteen billion, five hundred ninety-four million, nineteen thousand, six hundred sixty-three".