18105855363 has 24 divisors (see below), whose sum is σ = 26310735360. Its totient is φ = 11997913200.

The previous prime is 18105855311. The next prime is 18105855401. The reversal of 18105855363 is 36355850181.

18105855363 is a `hidden beast` number, since 1 + 8 + 1 + 0 + 585 + 5 + 3 + 63 = 666.

It is a Cunningham number, because it is equal to 134558²-1.

It is not a de Polignac number, because 18105855363 - 2⁸ = 18105855107 is a prime.

It is not an unprimeable number, because it can be changed into a prime (18105855463) 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 in 23 ways as a sum of consecutive naturals, for example, 1203538 + ... + 1218488.

It is an arithmetic number, because the mean of its divisors is an integer number (1096280640).

Almost surely, 2^18105855363 is an apocalyptic number.

18105855363 is a deficient number, since it is larger than the sum of its proper divisors (8204879997).

18105855363 is a wasteful number, since it uses less digits than its factorization.

18105855363 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15759 (or 15756 counting only the distinct ones).

The product of its (nonzero) digits is 432000, while the sum is 45.

The spelling of 18105855363 in words is "eighteen billion, one hundred five million, eight hundred fifty-five thousand, three hundred sixty-three".