18647618368 has 56 divisors (see below), whose sum is σ = 39341438208. Its totient is φ = 8750117376.

The previous prime is 18647618351. The next prime is 18647618369. The reversal of 18647618368 is 86381674681.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18647618369) 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, 41496 + ... + 197527.

Almost surely, 2^18647618368 is an apocalyptic number.

It is an amenable number.

18647618368 is an abundant number, since it is smaller than the sum of its proper divisors (20693819840).

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

18647618368 is a wasteful number, since it uses less digits than its factorization.

18647618368 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 239111 (or 239101 counting only the distinct ones).

The product of its digits is 9289728, while the sum is 58.

The spelling of 18647618368 in words is "eighteen billion, six hundred forty-seven million, six hundred eighteen thousand, three hundred sixty-eight".