18346508903889 has 12 divisors (see below), whose sum is σ = 27216742938996. Its totient is φ = 11900438207712.

The previous prime is 18346508903881. The next prime is 18346508903893. The reversal of 18346508903889 is 98830980564381.

18346508903889 is a `hidden beast` number, since 1 + 8 + 3 + 4 + 6 + 508 + 9 + 0 + 38 + 89 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 8014192974225 + 10332315929664 = 2830935^2 + 3214392^2 .

It is not a de Polignac number, because 18346508903889 - 2³ = 18346508903881 is a prime.

It is not an unprimeable number, because it can be changed into a prime (18346508903881) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 27547310334 + ... + 27547310999.

It is an arithmetic number, because the mean of its divisors is an integer number (2268061911583).

Almost surely, 2^{18346508903889} is an apocalyptic number.

It is an amenable number.

18346508903889 is a deficient number, since it is larger than the sum of its proper divisors (8870234035107).

18346508903889 is a wasteful number, since it uses less digits than its factorization.

18346508903889 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55094621376 (or 55094621373 counting only the distinct ones).

The product of its (nonzero) digits is 358318080, while the sum is 72.

The spelling of 18346508903889 in words is "eighteen trillion, three hundred forty-six billion, five hundred eight million, nine hundred three thousand, eight hundred eighty-nine".