18780982 has 16 divisors (see below), whose sum is σ = 30840912. Its totient is φ = 8506720.

The previous prime is 18780967. The next prime is 18781001. The reversal of 18780982 is 28908781.

It is a congruent number.

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, 5628 + ... + 8320.

It is an arithmetic number, because the mean of its divisors is an integer number (1927557).

Almost surely, 2^18780982 is an apocalyptic number.

18780982 is a deficient number, since it is larger than the sum of its proper divisors (12059930).

18780982 is a wasteful number, since it uses less digits than its factorization.

18780982 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3023.

The product of its (nonzero) digits is 64512, while the sum is 43.

The square root of 18780982 is about 4333.7030355113. The cubic root of 18780982 is about 265.8108874982.

The spelling of 18780982 in words is "eighteen million, seven hundred eighty thousand, nine hundred eighty-two".