18038189 has 8 divisors (see below), whose sum is σ = 19700352. Its totient is φ = 16415280.

The previous prime is 18038159. The next prime is 18038197. The reversal of 18038189 is 98183081.

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

It is a cyclic number.

It is not a de Polignac number, because 18038189 - 2⁸ = 18037933 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18038159) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8849 + ... + 10694.

It is an arithmetic number, because the mean of its divisors is an integer number (2462544).

Almost surely, 2^18038189 is an apocalyptic number.

It is an amenable number.

18038189 is a deficient number, since it is larger than the sum of its proper divisors (1662163).

18038189 is a wasteful number, since it uses less digits than its factorization.

18038189 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19627.

The product of its (nonzero) digits is 13824, while the sum is 38.

The square root of 18038189 is about 4247.1389193197. The cubic root of 18038189 is about 262.2593483042.

The spelling of 18038189 in words is "eighteen million, thirty-eight thousand, one hundred eighty-nine".