18123244 has 12 divisors (see below), whose sum is σ = 32314464. Its totient is φ = 8890544.

The previous prime is 18123223. The next prime is 18123257. The reversal of 18123244 is 44232181.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 42532 + ... + 42955.

It is an arithmetic number, because the mean of its divisors is an integer number (2692872).

Almost surely, 2^18123244 is an apocalyptic number.

It is an amenable number.

18123244 is a deficient number, since it is larger than the sum of its proper divisors (14191220).

18123244 is a wasteful number, since it uses less digits than its factorization.

18123244 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 85544 (or 85542 counting only the distinct ones).

The product of its digits is 1536, while the sum is 25.

The square root of 18123244 is about 4257.1403547452. The cubic root of 18123244 is about 262.6709103159.

The spelling of 18123244 in words is "eighteen million, one hundred twenty-three thousand, two hundred forty-four".