18140982 has 8 divisors (see below), whose sum is σ = 36281976. Its totient is φ = 6046992.

The previous prime is 18140981. The next prime is 18141031. The reversal of 18140982 is 28904181.

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

18140982 is an admirable number.

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18140981) 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 3 ways as a sum of consecutive naturals, for example, 1511743 + ... + 1511754.

It is an arithmetic number, because the mean of its divisors is an integer number (4535247).

Almost surely, 2^18140982 is an apocalyptic number.

18140982 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

18140982 is a wasteful number, since it uses less digits than its factorization.

18140982 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3023502.

The product of its (nonzero) digits is 4608, while the sum is 33.

The square root of 18140982 is about 4259.2231686072. The cubic root of 18140982 is about 262.7565781533.

The spelling of 18140982 in words is "eighteen million, one hundred forty thousand, nine hundred eighty-two".