18928797888 has 448 divisors, whose sum is σ = 67797273600. Its totient is φ = 4501094400.

The previous prime is 18928797859. The next prime is 18928797949. The reversal of 18928797888 is 88879782981.

It is a tau number, because it is divible by the number of its divisors (448).

It is an unprimeable number.

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 63 ways as a sum of consecutive naturals, for example, 28636278 + ... + 28636938.

It is an arithmetic number, because the mean of its divisors is an integer number (151333200).

Almost surely, 2^18928797888 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 18928797888, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33898636800).

18928797888 is an abundant number, since it is smaller than the sum of its proper divisors (48868475712).

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

18928797888 is a wasteful number, since it uses less digits than its factorization.

18928797888 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 856 (or 846 counting only the distinct ones).

The product of its digits is 260112384, while the sum is 75.

The spelling of 18928797888 in words is "eighteen billion, nine hundred twenty-eight million, seven hundred ninety-seven thousand, eight hundred eighty-eight".