18072339 has 8 divisors (see below), whose sum is σ = 24127440. Its totient is φ = 12032736.

The previous prime is 18072323. The next prime is 18072347. The reversal of 18072339 is 93327081.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 18072339 - 2⁴ = 18072323 is a prime.

It is not an unprimeable number, because it can be changed into a prime (18072389) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 804 + ... + 6065.

It is an arithmetic number, because the mean of its divisors is an integer number (3015930).

Almost surely, 2^18072339 is an apocalyptic number.

18072339 is a deficient number, since it is larger than the sum of its proper divisors (6055101).

18072339 is an equidigital number, since it uses as much as digits as its factorization.

18072339 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7749.

The product of its (nonzero) digits is 9072, while the sum is 33.

The square root of 18072339 is about 4251.1573718224. The cubic root of 18072339 is about 262.4247475900.

The spelling of 18072339 in words is "eighteen million, seventy-two thousand, three hundred thirty-nine".