18554144328 has 96 divisors (see below), whose sum is σ = 53246481600. Its totient is φ = 5820336000.

The previous prime is 18554144327. The next prime is 18554144339. The reversal of 18554144328 is 82344145581.

18554144328 is a `hidden beast` number, since 1 + 85 + 541 + 4 + 4 + 3 + 28 = 666.

It is not an unprimeable number, because it can be changed into a prime (18554144327) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 161658 + ... + 251478.

It is an arithmetic number, because the mean of its divisors is an integer number (554650850).

Almost surely, 2^18554144328 is an apocalyptic number.

18554144328 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 18554144328, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26623240800).

18554144328 is an abundant number, since it is smaller than the sum of its proper divisors (34692337272).

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

18554144328 is a wasteful number, since it uses less digits than its factorization.

18554144328 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 90003 (or 89996 counting only the distinct ones).

The product of its digits is 614400, while the sum is 45.

The spelling of 18554144328 in words is "eighteen billion, five hundred fifty-four million, one hundred forty-four thousand, three hundred twenty-eight".