18039706 has 8 divisors (see below), whose sum is σ = 27932544. Its totient is φ = 8728860.

The previous prime is 18039701. The next prime is 18039719. The reversal of 18039706 is 60793081.

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

It is not an unprimeable number, because it can be changed into a prime (18039701) 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 3 ways as a sum of consecutive naturals, for example, 145420 + ... + 145543.

It is an arithmetic number, because the mean of its divisors is an integer number (3491568).

Almost surely, 2^18039706 is an apocalyptic number.

18039706 is a deficient number, since it is larger than the sum of its proper divisors (9892838).

18039706 is a wasteful number, since it uses less digits than its factorization.

18039706 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 290996.

The product of its (nonzero) digits is 9072, while the sum is 34.

The square root of 18039706 is about 4247.3175063798. The cubic root of 18039706 is about 262.2667000452.

The spelling of 18039706 in words is "eighteen million, thirty-nine thousand, seven hundred six".