18647923168 has 48 divisors (see below), whose sum is σ = 41977371744. Its totient is φ = 7988244480.

The previous prime is 18647923163. The next prime is 18647923183. The reversal of 18647923168 is 86132974681.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18647923163) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 492696 + ... + 529192.

It is an arithmetic number, because the mean of its divisors is an integer number (874528578).

Almost surely, 2^18647923168 is an apocalyptic number.

It is an amenable number.

18647923168 is an abundant number, since it is smaller than the sum of its proper divisors (23329448576).

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

18647923168 is a wasteful number, since it uses less digits than its factorization.

18647923168 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38795 (or 38787 counting only the distinct ones).

The product of its digits is 3483648, while the sum is 55.

The spelling of 18647923168 in words is "eighteen billion, six hundred forty-seven million, nine hundred twenty-three thousand, one hundred sixty-eight".