18644895360 has 1024 divisors, whose sum is σ = 82910822400. Its totient is φ = 3855237120.

The previous prime is 18644895337. The next prime is 18644895439. The reversal of 18644895360 is 6359844681.

18644895360 is a `hidden beast` number, since 1 + 8 + 64 + 48 + 9 + 536 + 0 = 666.

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

It is a junction number, because it is equal to n+sod(n) for n = 18644895297 and 18644895306.

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 127 ways as a sum of consecutive naturals, for example, 111645997 + ... + 111646163.

It is an arithmetic number, because the mean of its divisors is an integer number (80967600).

Almost surely, 2^18644895360 is an apocalyptic number.

18644895360 is a gapful number since it is divisible by the number (10) 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 18644895360, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (41455411200).

18644895360 is an abundant number, since it is smaller than the sum of its proper divisors (64265927040).

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

18644895360 is a wasteful number, since it uses less digits than its factorization.

18644895360 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 286 (or 268 counting only the distinct ones).

The product of its (nonzero) digits is 4976640, while the sum is 54.

The spelling of 18644895360 in words is "eighteen billion, six hundred forty-four million, eight hundred ninety-five thousand, three hundred sixty".