18039746 has 8 divisors (see below), whose sum is σ = 27078204. Its totient is φ = 9013680.

The previous prime is 18039739. The next prime is 18039761. The reversal of 18039746 is 64793081.

It can be written as a sum of positive squares in 2 ways, for example, as 15015625 + 3024121 = 3875^2 + 1739^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2756 + ... + 6608.

Almost surely, 2^18039746 is an apocalyptic number.

18039746 is a deficient number, since it is larger than the sum of its proper divisors (9038458).

18039746 is a wasteful number, since it uses less digits than its factorization.

18039746 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6196.

The product of its (nonzero) digits is 36288, while the sum is 38.

The square root of 18039746 is about 4247.3222152316. The cubic root of 18039746 is about 262.2668938891.

The spelling of 18039746 in words is "eighteen million, thirty-nine thousand, seven hundred forty-six".