18842894568 has 128 divisors (see below), whose sum is σ = 53313120000. Its totient is φ = 6242386176.

The previous prime is 18842894563. The next prime is 18842894591. The reversal of 18842894568 is 86549824881.

It is not an unprimeable number, because it can be changed into a prime (18842894563) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2918608 + ... + 2925056.

It is an arithmetic number, because the mean of its divisors is an integer number (416508750).

Almost surely, 2^18842894568 is an apocalyptic number.

18842894568 is a gapful number since it is divisible by the number (18) 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 18842894568, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26656560000).

18842894568 is an abundant number, since it is smaller than the sum of its proper divisors (34470225432).

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

18842894568 is an equidigital number, since it uses as much as digits as its factorization.

18842894568 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6643 (or 6621 counting only the distinct ones).

The product of its digits is 35389440, while the sum is 63.

The spelling of 18842894568 in words is "eighteen billion, eight hundred forty-two million, eight hundred ninety-four thousand, five hundred sixty-eight".