18329144 has 8 divisors (see below), whose sum is σ = 34367160. Its totient is φ = 9164568.

The previous prime is 18329141. The next prime is 18329161. The reversal of 18329144 is 44192381.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (8).

It is a self number, because there is not a number n which added to its sum of digits gives 18329144.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18329141) 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 as a sum of consecutive naturals, namely, 1145564 + ... + 1145579.

It is an arithmetic number, because the mean of its divisors is an integer number (4295895).

Almost surely, 2^18329144 is an apocalyptic number.

It is an amenable number.

18329144 is a deficient number, since it is larger than the sum of its proper divisors (16038016).

18329144 is a wasteful number, since it uses less digits than its factorization.

18329144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2291149 (or 2291145 counting only the distinct ones).

The product of its digits is 6912, while the sum is 32.

The square root of 18329144 is about 4281.2549562015. The cubic root of 18329144 is about 263.6619103410.

The spelling of 18329144 in words is "eighteen million, three hundred twenty-nine thousand, one hundred forty-four".