18140382 has 32 divisors (see below), whose sum is σ = 43414560. Its totient is φ = 5581440.

The previous prime is 18140371. The next prime is 18140387. The reversal of 18140382 is 28304181.

18140382 is a `hidden beast` number, since 181 + 403 + 82 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a plaindrome in base 16.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18140387) 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, 12219 + ... + 13622.

It is an arithmetic number, because the mean of its divisors is an integer number (1356705).

Almost surely, 2^18140382 is an apocalyptic number.

18140382 is an abundant number, since it is smaller than the sum of its proper divisors (25274178).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

18140382 is a wasteful number, since it uses less digits than its factorization.

18140382 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25865 (or 25859 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 27.

The square root of 18140382 is about 4259.1527326453. The cubic root of 18140382 is about 262.7536812928.

The spelling of 18140382 in words is "eighteen million, one hundred forty thousand, three hundred eighty-two".