18933871488 has 256 divisors, whose sum is σ = 62459904000. Its totient is φ = 4959221760.

The previous prime is 18933871471. The next prime is 18933871511. The reversal of 18933871488 is 88417833981.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1577253 + ... + 1589211.

It is an arithmetic number, because the mean of its divisors is an integer number (243984000).

Almost surely, 2^18933871488 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 18933871488, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31229952000).

18933871488 is an abundant number, since it is smaller than the sum of its proper divisors (43526032512).

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

18933871488 is a wasteful number, since it uses less digits than its factorization.

18933871488 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12033 (or 12021 counting only the distinct ones).

The product of its digits is 9289728, while the sum is 60.

The spelling of 18933871488 in words is "eighteen billion, nine hundred thirty-three million, eight hundred seventy-one thousand, four hundred eighty-eight".