18328868544 has 336 divisors, whose sum is σ = 59855307264. Its totient is φ = 4839690240.

The previous prime is 18328868449. The next prime is 18328868549. The reversal of 18328868544 is 44586882381.

It is a tau number, because it is divible by the number of its divisors (336).

It is not an unprimeable number, because it can be changed into a prime (18328868549) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 29706124 + ... + 29706740.

Almost surely, 2^18328868544 is an apocalyptic number.

18328868544 is a gapful number since it is divisible by the number (14) 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 18328868544, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29927653632).

18328868544 is an abundant number, since it is smaller than the sum of its proper divisors (41526438720).

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

18328868544 is a wasteful number, since it uses less digits than its factorization.

18328868544 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 724 (or 683 counting only the distinct ones).

The product of its digits is 11796480, while the sum is 57.

The spelling of 18328868544 in words is "eighteen billion, three hundred twenty-eight million, eight hundred sixty-eight thousand, five hundred forty-four".