18686670912 has 672 divisors, whose sum is σ = 71068338432. Its totient is φ = 4554620928.

The previous prime is 18686670857. The next prime is 18686670913. The reversal of 18686670912 is 21907668681.

It is a tau number, because it is divible by the number of its divisors (672).

It is not an unprimeable number, because it can be changed into a prime (18686670913) 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 95 ways as a sum of consecutive naturals, for example, 59701668 + ... + 59701980.

It is an arithmetic number, because the mean of its divisors is an integer number (105756456).

Almost surely, 2^18686670912 is an apocalyptic number.

18686670912 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18686670912, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35534169216).

18686670912 is an abundant number, since it is smaller than the sum of its proper divisors (52381667520).

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

18686670912 is a wasteful number, since it uses less digits than its factorization.

18686670912 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 435 (or 422 counting only the distinct ones).

The product of its (nonzero) digits is 1741824, while the sum is 54.

The spelling of 18686670912 in words is "eighteen billion, six hundred eighty-six million, six hundred seventy thousand, nine hundred twelve".