18780332 has 12 divisors (see below), whose sum is σ = 32919936. Its totient is φ = 9374640.

The previous prime is 18780331. The next prime is 18780347. The reversal of 18780332 is 23308781.

It is not an unprimeable number, because it can be changed into a prime (18780331) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 908 + ... + 6195.

It is an arithmetic number, because the mean of its divisors is an integer number (2743328).

Almost surely, 2^18780332 is an apocalyptic number.

It is an amenable number.

18780332 is a deficient number, since it is larger than the sum of its proper divisors (14139604).

18780332 is a wasteful number, since it uses less digits than its factorization.

18780332 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7768 (or 7766 counting only the distinct ones).

The product of its (nonzero) digits is 8064, while the sum is 32.

The square root of 18780332 is about 4333.6280412606. The cubic root of 18780332 is about 265.8078209374.

The spelling of 18780332 in words is "eighteen million, seven hundred eighty thousand, three hundred thirty-two".