18484736544 has 120 divisors (see below), whose sum is σ = 56116988928. Its totient is φ = 5962792320.

The previous prime is 18484736533. The next prime is 18484736563. The reversal of 18484736544 is 44563748481.

18484736544 is a `hidden beast` number, since 18 + 4 + 84 + 7 + 3 + 6 + 544 = 666.

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

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 34672 + ... + 195375.

Almost surely, 2^18484736544 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 18484736544, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28058494464).

18484736544 is an abundant number, since it is smaller than the sum of its proper divisors (37632252384).

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

18484736544 is a wasteful number, since it uses less digits than its factorization.

18484736544 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 230100 (or 230083 counting only the distinct ones).

The product of its digits is 10321920, while the sum is 54.

The spelling of 18484736544 in words is "eighteen billion, four hundred eighty-four million, seven hundred thirty-six thousand, five hundred forty-four".