18489910968960 has 256 divisors, whose sum is σ = 59818871692800. Its totient is φ = 4857240453120.

The previous prime is 18489910968937. The next prime is 18489910968961. The reversal of 18489910968960 is 6986901998481.

It is not an unprimeable number, because it can be changed into a prime (18489910968961) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 46108842 + ... + 46508118.

It is an arithmetic number, because the mean of its divisors is an integer number (233667467550).

Almost surely, 2^{18489910968960} is an apocalyptic number.

18489910968960 is a gapful number since it is divisible by the number (10) 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 18489910968960, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29909435846400).

18489910968960 is an abundant number, since it is smaller than the sum of its proper divisors (41328960723840).

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

18489910968960 is a wasteful number, since it uses less digits than its factorization.

18489910968960 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 399659 (or 399647 counting only the distinct ones).

The product of its (nonzero) digits is 483729408, while the sum is 78.

The spelling of 18489910968960 in words is "eighteen trillion, four hundred eighty-nine billion, nine hundred ten million, nine hundred sixty-eight thousand, nine hundred sixty".