18494767648 has 96 divisors (see below), whose sum is σ = 43271359488. Its totient is φ = 7614259200.

The previous prime is 18494767639. The next prime is 18494767649. The reversal of 18494767648 is 84676749481.

It is a self number, because there is not a number n which added to its sum of digits gives 18494767648.

It is not an unprimeable number, because it can be changed into a prime (18494767649) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 941608 + ... + 961048.

It is an arithmetic number, because the mean of its divisors is an integer number (450743328).

Almost surely, 2^18494767648 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18494767648, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21635679744).

18494767648 is an abundant number, since it is smaller than the sum of its proper divisors (24776591840).

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

18494767648 is a wasteful number, since it uses less digits than its factorization.

18494767648 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19626 (or 19618 counting only the distinct ones).

The product of its digits is 65028096, while the sum is 64.

The spelling of 18494767648 in words is "eighteen billion, four hundred ninety-four million, seven hundred sixty-seven thousand, six hundred forty-eight".