18680446 has 8 divisors (see below), whose sum is σ = 28143720. Its totient is φ = 9299208.

The previous prime is 18680443. The next prime is 18680503. The reversal of 18680446 is 64408681.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18680443) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 19936 + ... + 20851.

It is an arithmetic number, because the mean of its divisors is an integer number (3517965).

Almost surely, 2^18680446 is an apocalyptic number.

18680446 is a deficient number, since it is larger than the sum of its proper divisors (9463274).

18680446 is a wasteful number, since it uses less digits than its factorization.

18680446 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41018.

The product of its (nonzero) digits is 36864, while the sum is 37.

The square root of 18680446 is about 4322.0881527336. The cubic root of 18680446 is about 265.3357368003.

The spelling of 18680446 in words is "eighteen million, six hundred eighty thousand, four hundred forty-six".