18021682 has 16 divisors (see below), whose sum is σ = 30984192. Its totient is φ = 7701120.

The previous prime is 18021677. The next prime is 18021691. The reversal of 18021682 is 28612081.

It is a self number, because there is not a number n which added to its sum of digits gives 18021682.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 3682 + ... + 7042.

It is an arithmetic number, because the mean of its divisors is an integer number (1936512).

Almost surely, 2^18021682 is an apocalyptic number.

18021682 is a deficient number, since it is larger than the sum of its proper divisors (12962510).

18021682 is a wasteful number, since it uses less digits than its factorization.

18021682 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3753.

The product of its (nonzero) digits is 1536, while the sum is 28.

The square root of 18021682 is about 4245.1951663027. The cubic root of 18021682 is about 262.1793248185.

The spelling of 18021682 in words is "eighteen million, twenty-one thousand, six hundred eighty-two".