18530484778848 has 144 divisors (see below), whose sum is σ = 56588734142640. Its totient is φ = 5293996130304.

The previous prime is 18530484778847. The next prime is 18530484778901. The reversal of 18530484778848 is 84887748403581.

It is a super-2 number, since 2×18530484778848² (a number of 27 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (75) coincides with the sum of the digits of its prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 18530484778848.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18530484778847) 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, 60477040 + ... + 60782672.

It is an arithmetic number, because the mean of its divisors is an integer number (392977320435).

Almost surely, 2^{18530484778848} 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 18530484778848, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28294367071320).

18530484778848 is an abundant number, since it is smaller than the sum of its proper divisors (38058249363792).

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

18530484778848 is a wasteful number, since it uses less digits than its factorization.

18530484778848 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 318549 (or 318534 counting only the distinct ones).

The product of its (nonzero) digits is 1541406720, while the sum is 75.

The spelling of 18530484778848 in words is "eighteen trillion, five hundred thirty billion, four hundred eighty-four million, seven hundred seventy-eight thousand, eight hundred forty-eight".