18214944 has 96 divisors (see below), whose sum is σ = 53415936. Its totient is φ = 5387520.

The previous prime is 18214943. The next prime is 18214957. The reversal of 18214944 is 44941281.

It is a tau number, because it is divible by the number of its divisors (96).

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18214943) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 49449 + ... + 49815.

It is an arithmetic number, because the mean of its divisors is an integer number (556416).

Almost surely, 2^18214944 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 18214944, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26707968).

18214944 is an abundant number, since it is smaller than the sum of its proper divisors (35200992).

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

18214944 is a wasteful number, since it uses less digits than its factorization.

18214944 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 438 (or 430 counting only the distinct ones).

The product of its digits is 9216, while the sum is 33.

The square root of 18214944 is about 4267.8969059714. The cubic root of 18214944 is about 263.1131860160.

The spelling of 18214944 in words is "eighteen million, two hundred fourteen thousand, nine hundred forty-four".