18071686336 has 28 divisors (see below), whose sum is σ = 39121095240. Its totient is φ = 8214402560.

The previous prime is 18071686309. The next prime is 18071686337. The reversal of 18071686336 is 63368617081.

It is a self number, because there is not a number n which added to its sum of digits gives 18071686336.

It is not an unprimeable number, because it can be changed into a prime (18071686337) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12834301 + ... + 12835708.

Almost surely, 2^18071686336 is an apocalyptic number.

18071686336 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

18071686336 is an abundant number, since it is smaller than the sum of its proper divisors (21049408904).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

18071686336 is a wasteful number, since it uses less digits than its factorization.

18071686336 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25670032 (or 25670022 counting only the distinct ones).

The product of its (nonzero) digits is 870912, while the sum is 49.

It can be divided in two parts, 18071 and 686336, that added together give a palindrome (704407).

The spelling of 18071686336 in words is "eighteen billion, seventy-one million, six hundred eighty-six thousand, three hundred thirty-six".