18157568 has 104 divisors (see below), whose sum is σ = 44034816. Its totient is φ = 7372800.

The previous prime is 18157553. The next prime is 18157577. The reversal of 18157568 is 86575181.

It is a tau number, because it is divible by the number of its divisors (104).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 585713 + ... + 585743.

Almost surely, 2^18157568 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 18157568, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22017408).

18157568 is an abundant number, since it is smaller than the sum of its proper divisors (25877248).

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

18157568 is a wasteful number, since it uses less digits than its factorization.

18157568 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 79 (or 57 counting only the distinct ones).

The product of its digits is 67200, while the sum is 41.

The square root of 18157568 is about 4261.1697924396. The cubic root of 18157568 is about 262.8366317599.

The spelling of 18157568 in words is "eighteen million, one hundred fifty-seven thousand, five hundred sixty-eight".