18432244 has 12 divisors (see below), whose sum is σ = 32318244. Its totient is φ = 9198464.

The previous prime is 18432241. The next prime is 18432277. The reversal of 18432244 is 44223481.

It is a happy number.

18432244 is nontrivially palindromic in base 3.

It can be written as a sum of positive squares in 2 ways, for example, as 7290000 + 11142244 = 2700^2 + 3338^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18432241) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1909 + ... + 6364.

It is an arithmetic number, because the mean of its divisors is an integer number (2693187).

Almost surely, 2^18432244 is an apocalyptic number.

It is an amenable number.

18432244 is a deficient number, since it is larger than the sum of its proper divisors (13886000).

18432244 is a wasteful number, since it uses less digits than its factorization.

18432244 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8834 (or 8832 counting only the distinct ones).

The product of its digits is 6144, while the sum is 28.

The square root of 18432244 is about 4293.2789334028. The cubic root of 18432244 is about 264.1553455173.

The spelling of 18432244 in words is "eighteen million, four hundred thirty-two thousand, two hundred forty-four".