18621682 has 16 divisors (see below), whose sum is σ = 28656000. Its totient is φ = 9071568.

The previous prime is 18621671. The next prime is 18621703. The reversal of 18621682 is 28612681.

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, 37069 + ... + 37567.

It is an arithmetic number, because the mean of its divisors is an integer number (1791000).

Almost surely, 2^18621682 is an apocalyptic number.

18621682 is a deficient number, since it is larger than the sum of its proper divisors (10034318).

18621682 is a wasteful number, since it uses less digits than its factorization.

18621682 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 945.

The product of its digits is 9216, while the sum is 34.

The square root of 18621682 is about 4315.2846951273. The cubic root of 18621682 is about 265.0572179759.

Subtracting 18621682 from its reverse (28612681), we obtain a palindrome (9990999).

The spelling of 18621682 in words is "eighteen million, six hundred twenty-one thousand, six hundred eighty-two".