18745552 has 80 divisors (see below), whose sum is σ = 45711360. Its totient is φ = 7261056.

The previous prime is 18745537. The next prime is 18745561. The reversal of 18745552 is 25554781.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 48753 + ... + 49135.

It is an arithmetic number, because the mean of its divisors is an integer number (571392).

Almost surely, 2^18745552 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 18745552, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22855680).

18745552 is an abundant number, since it is smaller than the sum of its proper divisors (26965808).

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

18745552 is a wasteful number, since it uses less digits than its factorization.

18745552 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 440 (or 434 counting only the distinct ones).

The product of its digits is 56000, while the sum is 37.

The square root of 18745552 is about 4329.6133776586. The cubic root of 18745552 is about 265.6436330551.

The spelling of 18745552 in words is "eighteen million, seven hundred forty-five thousand, five hundred fifty-two".