18105820585 has 16 divisors (see below), whose sum is σ = 22609097280. Its totient is φ = 13908000960.

The previous prime is 18105820583. The next prime is 18105820609. The reversal of 18105820585 is 58502850181.

It is not a de Polignac number, because 18105820585 - 2¹ = 18105820583 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (43).

It is not an unprimeable number, because it can be changed into a prime (18105820583) 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 15 ways as a sum of consecutive naturals, for example, 700986 + ... + 726355.

It is an arithmetic number, because the mean of its divisors is an integer number (1413068580).

Almost surely, 2^18105820585 is an apocalyptic number.

It is an amenable number.

18105820585 is a deficient number, since it is larger than the sum of its proper divisors (4503276695).

18105820585 is a wasteful number, since it uses less digits than its factorization.

18105820585 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1427448.

The product of its (nonzero) digits is 128000, while the sum is 43.

The spelling of 18105820585 in words is "eighteen billion, one hundred five million, eight hundred twenty thousand, five hundred eighty-five".