18041856 has 88 divisors (see below), whose sum is σ = 55023360. Its totient is φ = 5148672.

The previous prime is 18041831. The next prime is 18041869. The reversal of 18041856 is 65814081.

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, 21085 + ... + 21923.

Almost surely, 2^18041856 is an apocalyptic number.

18041856 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18041856, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27511680).

18041856 is an abundant number, since it is smaller than the sum of its proper divisors (36981504).

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

18041856 is an equidigital number, since it uses as much as digits as its factorization.

18041856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 869 (or 851 counting only the distinct ones).

The product of its (nonzero) digits is 7680, while the sum is 33.

The square root of 18041856 is about 4247.5705997664. The cubic root of 18041856 is about 262.2771187480.

The spelling of 18041856 in words is "eighteen million, forty-one thousand, eight hundred fifty-six".