18420382 has 16 divisors (see below), whose sum is σ = 28419552. Its totient is φ = 8951040.

The previous prime is 18420379. The next prime is 18420407. The reversal of 18420382 is 28302481.

It is a self number, because there is not a number n which added to its sum of digits gives 18420382.

It is a congruent number.

It is an unprimeable number.

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, 9478 + ... + 11254.

It is an arithmetic number, because the mean of its divisors is an integer number (1776222).

Almost surely, 2^18420382 is an apocalyptic number.

18420382 is a deficient number, since it is larger than the sum of its proper divisors (9999170).

18420382 is a wasteful number, since it uses less digits than its factorization.

18420382 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1923.

The product of its (nonzero) digits is 3072, while the sum is 28.

The square root of 18420382 is about 4291.8972494691. The cubic root of 18420382 is about 264.0986679706.

The spelling of 18420382 in words is "eighteen million, four hundred twenty thousand, three hundred eighty-two".