18356768 has 48 divisors (see below), whose sum is σ = 37920960. Its totient is φ = 8736000.

The previous prime is 18356759. The next prime is 18356771. The reversal of 18356768 is 86765381.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 121493 + ... + 121643.

It is an arithmetic number, because the mean of its divisors is an integer number (790020).

Almost surely, 2^18356768 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 18356768, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (18960480).

18356768 is an abundant number, since it is smaller than the sum of its proper divisors (19564192).

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

18356768 is a wasteful number, since it uses less digits than its factorization.

18356768 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 321 (or 313 counting only the distinct ones).

The product of its digits is 241920, while the sum is 44.

The square root of 18356768 is about 4284.4798984241. The cubic root of 18356768 is about 263.7942995153.

The spelling of 18356768 in words is "eighteen million, three hundred fifty-six thousand, seven hundred sixty-eight".