18366081847 has 2 divisors, whose sum is σ = 18366081848. Its totient is φ = 18366081846.

The previous prime is 18366081829. The next prime is 18366081863. The reversal of 18366081847 is 74818066381.

It is a strong prime.

It is an emirp because it is prime and its reverse (74818066381) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 18366081847 - 2¹¹ = 18366079799 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 18366081794 and 18366081803.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18366081827) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9183040923 + 9183040924.

It is an arithmetic number, because the mean of its divisors is an integer number (9183040924).

Almost surely, 2^18366081847 is an apocalyptic number.

18366081847 is a deficient number, since it is larger than the sum of its proper divisors (1).

18366081847 is an equidigital number, since it uses as much as digits as its factorization.

18366081847 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1548288, while the sum is 52.

The spelling of 18366081847 in words is "eighteen billion, three hundred sixty-six million, eighty-one thousand, eight hundred forty-seven".