18518552 has 64 divisors (see below), whose sum is σ = 39584160. Its totient is φ = 8064000.

The previous prime is 18518551. The next prime is 18518557. The reversal of 18518552 is 25581581.

Its product of digits (16000) is a multiple of the sum of its prime divisors (200).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18518551) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 183302 + ... + 183402.

Almost surely, 2^18518552 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 18518552, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (19792080).

18518552 is an abundant number, since it is smaller than the sum of its proper divisors (21065608).

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

18518552 is a wasteful number, since it uses less digits than its factorization.

18518552 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 204 (or 200 counting only the distinct ones).

The product of its digits is 16000, while the sum is 35.

The square root of 18518552 is about 4303.3187193142. The cubic root of 18518552 is about 264.5670014402.

The spelling of 18518552 in words is "eighteen million, five hundred eighteen thousand, five hundred fifty-two".