18886061172 has 24 divisors (see below), whose sum is σ = 48073610592. Its totient is φ = 5723048800.

The previous prime is 18886061147. The next prime is 18886061177. The reversal of 18886061172 is 27116068881.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18886061177) 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 7 ways as a sum of consecutive naturals, for example, 71537979 + ... + 71538242.

It is an arithmetic number, because the mean of its divisors is an integer number (2003067108).

Almost surely, 2^18886061172 is an apocalyptic number.

18886061172 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

18886061172 is an abundant number, since it is smaller than the sum of its proper divisors (29187549420).

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

18886061172 is a wasteful number, since it uses less digits than its factorization.

18886061172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 143076239 (or 143076237 counting only the distinct ones).

The product of its (nonzero) digits is 258048, while the sum is 48.

The spelling of 18886061172 in words is "eighteen billion, eight hundred eighty-six million, sixty-one thousand, one hundred seventy-two".