18204040040 has 16 divisors (see below), whose sum is σ = 40959090180. Its totient is φ = 7281616000.

The previous prime is 18204040027. The next prime is 18204040093. The reversal of 18204040040 is 4004040281.

It can be written as a sum of positive squares in 2 ways, for example, as 18172657636 + 31382404 = 134806^2 + 5602^2 .

It is a junction number, because it is equal to n+sod(n) for n = 18204039988 and 18204040015.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 227550461 + ... + 227550540.

Almost surely, 2^18204040040 is an apocalyptic number.

18204040040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18204040040 is an abundant number, since it is smaller than the sum of its proper divisors (22755050140).

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

18204040040 is a wasteful number, since it uses less digits than its factorization.

18204040040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 455101012 (or 455101008 counting only the distinct ones).

The product of its (nonzero) digits is 1024, while the sum is 23.

The spelling of 18204040040 in words is "eighteen billion, two hundred four million, forty thousand, forty".