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18038 = 229311

18038 has 8 divisors (see below), whose sum is σ = 28080. Its totient is φ = 8680.

The previous prime is 18013. The next prime is 18041. The reversal of 18038 is 83081.

18038 is nontrivially palindromic in base 9.

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

It is a nialpdrome in base 12.

It is a congruent number.

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, 98 + ... + 213.

It is an arithmetic number, because the mean of its divisors is an integer number (3510).

218038 is an apocalyptic number.

18038 is a deficient number, since it is larger than the sum of its proper divisors (10042).

18038 is a wasteful number, since it uses less digits than its factorization.

18038 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 342.

The product of its (nonzero) digits is 192, while the sum is 20.

The square root of 18038 is about 134.3056216247. The cubic root of 18038 is about 26.2258432337.

The spelling of 18038 in words is "eighteen thousand, thirty-eight".

Divisors: 1 2 29 58 311 622 9019 18038