18046944 has 72 divisors (see below), whose sum is σ = 51734592. Its totient is φ = 5967360.

The previous prime is 18046943. The next prime is 18046949. The reversal of 18046944 is 44964081.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (72).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 18046899 and 18046908.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18046943) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 64084 + ... + 64364.

It is an arithmetic number, because the mean of its divisors is an integer number (718536).

Almost surely, 2^18046944 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 18046944, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25867296).

18046944 is an abundant number, since it is smaller than the sum of its proper divisors (33687648).

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

18046944 is a wasteful number, since it uses less digits than its factorization.

18046944 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 520 (or 509 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 36.

The square root of 18046944 is about 4248.1694881443. The cubic root of 18046944 is about 262.3017714325.

The spelling of 18046944 in words is "eighteen million, forty-six thousand, nine hundred forty-four".