18375081984 has 640 divisors, whose sum is σ = 66990401280. Its totient is φ = 4904976384.

The previous prime is 18375081979. The next prime is 18375081997. The reversal of 18375081984 is 48918057381.

18375081984 is a `hidden beast` number, since 18 + 37 + 508 + 1 + 98 + 4 = 666.

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

It is a self number, because there is not a number n which added to its sum of digits gives 18375081984.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 427327467 + ... + 427327509.

It is an arithmetic number, because the mean of its divisors is an integer number (104672502).

Almost surely, 2^18375081984 is an apocalyptic number.

18375081984 is a gapful number since it is divisible by the number (14) 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 18375081984, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33495200640).

18375081984 is an abundant number, since it is smaller than the sum of its proper divisors (48615319296).

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

18375081984 is an frugal number, since it uses more digits than its factorization.

18375081984 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 115 (or 78 counting only the distinct ones).

The product of its (nonzero) digits is 1935360, while the sum is 54.

The spelling of 18375081984 in words is "eighteen billion, three hundred seventy-five million, eighty-one thousand, nine hundred eighty-four".