18039368 has 16 divisors (see below), whose sum is σ = 34398000. Its totient is φ = 8866576.

The previous prime is 18039367. The next prime is 18039389. The reversal of 18039368 is 86393081.

It is a super-3 number, since 3×18039368³ (a number of 23 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (18039361) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18638 + ... + 19581.

It is an arithmetic number, because the mean of its divisors is an integer number (2149875).

Almost surely, 2^18039368 is an apocalyptic number.

It is an amenable number.

18039368 is a deficient number, since it is larger than the sum of its proper divisors (16358632).

18039368 is a wasteful number, since it uses less digits than its factorization.

18039368 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38284 (or 38280 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 38.

The square root of 18039368 is about 4247.2777163732. The cubic root of 18039368 is about 262.2650620529.

The spelling of 18039368 in words is "eighteen million, thirty-nine thousand, three hundred sixty-eight".