18006231 has 8 divisors (see below), whose sum is σ = 24035184. Its totient is φ = 11990720.

The previous prime is 18006227. The next prime is 18006259. The reversal of 18006231 is 13260081.

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 18006231 - 2² = 18006227 is a prime.

It is a super-2 number, since 2×18006231² = 648448709650722, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 18006198 and 18006207.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18006221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 355 + ... + 6011.

It is an arithmetic number, because the mean of its divisors is an integer number (3004398).

Almost surely, 2^18006231 is an apocalyptic number.

18006231 is a deficient number, since it is larger than the sum of its proper divisors (6028953).

18006231 is a wasteful number, since it uses less digits than its factorization.

18006231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6721.

The product of its (nonzero) digits is 288, while the sum is 21.

The square root of 18006231 is about 4243.3749539724. The cubic root of 18006231 is about 262.1043763759.

The spelling of 18006231 in words is "eighteen million, six thousand, two hundred thirty-one".