18663460180 has 12 divisors (see below), whose sum is σ = 39193266420. Its totient is φ = 7465384064.

The previous prime is 18663460103. The next prime is 18663460181. The reversal of 18663460180 is 8106436681.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 2541571396 + 16121888784 = 50414^2 + 126972^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18663460181) 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 3 ways as a sum of consecutive naturals, for example, 466586485 + ... + 466586524.

It is an arithmetic number, because the mean of its divisors is an integer number (3266105535).

Almost surely, 2^18663460180 is an apocalyptic number.

18663460180 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18663460180 is an abundant number, since it is smaller than the sum of its proper divisors (20529806240).

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

18663460180 is a wasteful number, since it uses less digits than its factorization.

18663460180 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 933173018 (or 933173016 counting only the distinct ones).

The product of its (nonzero) digits is 165888, while the sum is 43.

The spelling of 18663460180 in words is "eighteen billion, six hundred sixty-three million, four hundred sixty thousand, one hundred eighty".