18047568 has 160 divisors (see below), whose sum is σ = 61424640. Its totient is φ = 4423680.

The previous prime is 18047551. The next prime is 18047581. The reversal of 18047568 is 86574081.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 70096 + ... + 70352.

It is an arithmetic number, because the mean of its divisors is an integer number (383904).

Almost surely, 2^18047568 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 18047568, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30712320).

18047568 is an abundant number, since it is smaller than the sum of its proper divisors (43377072).

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

18047568 is a wasteful number, since it uses less digits than its factorization.

18047568 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 305 (or 299 counting only the distinct ones).

The product of its (nonzero) digits is 53760, while the sum is 39.

The square root of 18047568 is about 4248.2429309068. The cubic root of 18047568 is about 262.3047945560.

The spelling of 18047568 in words is "eighteen million, forty-seven thousand, five hundred sixty-eight".