18039382 has 4 divisors (see below), whose sum is σ = 27059076. Its totient is φ = 9019690.

The previous prime is 18039367. The next prime is 18039389. The reversal of 18039382 is 28393081.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18039389) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4509844 + ... + 4509847.

It is an arithmetic number, because the mean of its divisors is an integer number (6764769).

Almost surely, 2^18039382 is an apocalyptic number.

18039382 is a deficient number, since it is larger than the sum of its proper divisors (9019694).

18039382 is an equidigital number, since it uses as much as digits as its factorization.

18039382 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9019693.

The product of its (nonzero) digits is 10368, while the sum is 34.

The square root of 18039382 is about 4247.2793644873. The cubic root of 18039382 is about 262.2651298991.

The spelling of 18039382 in words is "eighteen million, thirty-nine thousand, three hundred eighty-two".