18484544 has 42 divisors (see below), whose sum is σ = 39742110. Its totient is φ = 8526336.

The previous prime is 18484519. The next prime is 18484561. The reversal of 18484544 is 44548481.

18484544 = T₁₄₇ + T₁₄₈ + ... + T₄₈₄.

It can be written as a sum of positive squares in 3 ways, for example, as 506944 + 17977600 = 712^2 + 4240^2 .

It is a junction number, because it is equal to n+sod(n) for n = 18484498 and 18484507.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 9962 + ... + 11670.

Almost surely, 2^18484544 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 18484544, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (19871055).

18484544 is an abundant number, since it is smaller than the sum of its proper divisors (21257566).

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

18484544 is a wasteful number, since it uses less digits than its factorization.

18484544 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1747 (or 1724 counting only the distinct ones).

The product of its digits is 81920, while the sum is 38.

The square root of 18484544 is about 4299.3655345876. The cubic root of 18484544 is about 264.4049493910.

The spelling of 18484544 in words is "eighteen million, four hundred eighty-four thousand, five hundred forty-four".