18447884052 has 96 divisors (see below), whose sum is σ = 47313866880. Its totient is φ = 5559390720.

The previous prime is 18447884047. The next prime is 18447884053. The reversal of 18447884052 is 25048874481.

It is a happy number.

It is a Smith number, since the sum of its digits (51) coincides with the sum of the digits of its prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 18447883986 and 18447884004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18447884053) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 5711574 + ... + 5714802.

It is an arithmetic number, because the mean of its divisors is an integer number (492852780).

Almost surely, 2^18447884052 is an apocalyptic number.

18447884052 is a gapful number since it is divisible by the number (12) 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 18447884052, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23656933440).

18447884052 is an abundant number, since it is smaller than the sum of its proper divisors (28865982828).

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

18447884052 is a wasteful number, since it uses less digits than its factorization.

18447884052 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3993 (or 3991 counting only the distinct ones).

The product of its (nonzero) digits is 2293760, while the sum is 51.

The spelling of 18447884052 in words is "eighteen billion, four hundred forty-seven million, eight hundred eighty-four thousand, fifty-two".