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18037 = 171061

18037 has 4 divisors (see below), whose sum is σ = 19116. Its totient is φ = 16960.

The previous prime is 18013. The next prime is 18041. The reversal of 18037 is 73081.

It can be divided in two parts, 1803 and 7, that multiplied together give a palindrome (12621).

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 73081 = 107683.

It can be written as a sum of positive squares in 2 ways, for example, as 12996 + 5041 = 114^2 + 71^2 .

It is a cyclic number.

It is not a de Polignac number, because 18037 - 27 = 17909 is a prime.

It is a Duffinian number.

18037 is a modest number, since divided by 37 gives 18 as remainder.

It is a nialpdrome in base 12.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18047) 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, 514 + ... + 547.

It is an arithmetic number, because the mean of its divisors is an integer number (4779).

218037 is an apocalyptic number.

18037 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

It is an amenable number.

18037 is a deficient number, since it is larger than the sum of its proper divisors (1079).

18037 is a wasteful number, since it uses less digits than its factorization.

18037 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1078.

The product of its (nonzero) digits is 168, while the sum is 19.

The square root of 18037 is about 134.3018987208. The cubic root of 18037 is about 26.2253585841.

The spelling of 18037 in words is "eighteen thousand, thirty-seven".

Divisors: 1 17 1061 18037