18678181472772 has 48 divisors (see below), whose sum is σ = 43862320286400. Its totient is φ = 6186203183232.

The previous prime is 18678181472711. The next prime is 18678181472807. The reversal of 18678181472772 is 27727418187681.

It is a junction number, because it is equal to n+sod(n) for n = 18678181472697 and 18678181472706.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6829147 + ... + 9164802.

It is an arithmetic number, because the mean of its divisors is an integer number (913798339300).

Almost surely, 2^{18678181472772} is an apocalyptic number.

18678181472772 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

18678181472772 is an abundant number, since it is smaller than the sum of its proper divisors (25184138813628).

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

18678181472772 is a wasteful number, since it uses less digits than its factorization.

18678181472772 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15994580 (or 15994578 counting only the distinct ones).

The product of its digits is 118013952, while the sum is 69.

The spelling of 18678181472772 in words is "eighteen trillion, six hundred seventy-eight billion, one hundred eighty-one million, four hundred seventy-two thousand, seven hundred seventy-two".