18240993568 has 96 divisors (see below), whose sum is σ = 41539599360. Its totient is φ = 7723434240.

The previous prime is 18240993559. The next prime is 18240993569. The reversal of 18240993568 is 86539904281.

It is a hoax number, since the sum of its digits (55) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (18240993569) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6534253 + ... + 6537043.

It is an arithmetic number, because the mean of its divisors is an integer number (432704160).

Almost surely, 2^18240993568 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 18240993568, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20769799680).

18240993568 is an abundant number, since it is smaller than the sum of its proper divisors (23298605792).

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

18240993568 is a wasteful number, since it uses less digits than its factorization.

18240993568 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3150 (or 3142 counting only the distinct ones).

The product of its (nonzero) digits is 3732480, while the sum is 55.

The spelling of 18240993568 in words is "eighteen billion, two hundred forty million, nine hundred ninety-three thousand, five hundred sixty-eight".