18678181472802 has 48 divisors (see below), whose sum is σ = 40688342168760. Its totient is φ = 6192454104576.

The previous prime is 18678181472711. The next prime is 18678181472807. The reversal of 18678181472802 is 20827418187681.

18678181472802 is a `hidden beast` number, since 1 + 8 + 6 + 7 + 8 + 1 + 81 + 472 + 80 + 2 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 8920311182721 + 9757870290081 = 2986689^2 + 3123759^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 18678181472802.

It is not an unprimeable number, because it can be changed into a prime (18678181472807) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 381253 + ... + 6123864.

Almost surely, 2^{18678181472802} is an apocalyptic number.

18678181472802 is an abundant number, since it is smaller than the sum of its proper divisors (22010160695958).

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

18678181472802 is a wasteful number, since it uses less digits than its factorization.

18678181472802 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6505987 (or 6505984 counting only the distinct ones).

The product of its (nonzero) digits is 19267584, while the sum is 63.

The spelling of 18678181472802 in words is "eighteen trillion, six hundred seventy-eight billion, one hundred eighty-one million, four hundred seventy-two thousand, eight hundred two".