18142185 has 16 divisors (see below), whose sum is σ = 29128320. Its totient is φ = 9642240.

The previous prime is 18142183. The next prime is 18142199. The reversal of 18142185 is 58124181.

It is a happy number.

It is not a de Polignac number, because 18142185 - 2¹ = 18142183 is a prime.

It is not an unprimeable number, because it can be changed into a prime (18142181) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2721 + ... + 6609.

It is an arithmetic number, because the mean of its divisors is an integer number (1820520).

Almost surely, 2^18142185 is an apocalyptic number.

18142185 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

18142185 is a deficient number, since it is larger than the sum of its proper divisors (10986135).

18142185 is a wasteful number, since it uses less digits than its factorization.

18142185 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4208.

The product of its digits is 2560, while the sum is 30.

The square root of 18142185 is about 4259.3643892018. The cubic root of 18142185 is about 262.7623861663.

The spelling of 18142185 in words is "eighteen million, one hundred forty-two thousand, one hundred eighty-five".