18019594368 has 320 divisors, whose sum is σ = 55716724800. Its totient is φ = 5776386048.

The previous prime is 18019594337. The next prime is 18019594379. The reversal of 18019594368 is 86349591081.

18019594368 is a `hidden beast` number, since 1 + 8 + 0 + 19 + 594 + 36 + 8 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 41046693 + ... + 41047131.

It is an arithmetic number, because the mean of its divisors is an integer number (174114765).

Almost surely, 2^18019594368 is an apocalyptic number.

18019594368 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 18019594368, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27858362400).

18019594368 is an abundant number, since it is smaller than the sum of its proper divisors (37697130432).

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

18019594368 is a wasteful number, since it uses less digits than its factorization.

18019594368 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 609 (or 588 counting only the distinct ones).

The product of its (nonzero) digits is 1866240, while the sum is 54.

The spelling of 18019594368 in words is "eighteen billion, nineteen million, five hundred ninety-four thousand, three hundred sixty-eight".