18628946 has 16 divisors (see below), whose sum is σ = 32296320. Its totient is φ = 7893600.

The previous prime is 18628937. The next prime is 18628993. The reversal of 18628946 is 64982681.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 18628897 and 18628906.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6230 + ... + 8721.

It is an arithmetic number, because the mean of its divisors is an integer number (2018520).

Almost surely, 2^18628946 is an apocalyptic number.

18628946 is a deficient number, since it is larger than the sum of its proper divisors (13667374).

18628946 is a wasteful number, since it uses less digits than its factorization.

18628946 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15049.

The product of its digits is 165888, while the sum is 44.

The square root of 18628946 is about 4316.1262724809. The cubic root of 18628946 is about 265.0916782596.

The spelling of 18628946 in words is "eighteen million, six hundred twenty-eight thousand, nine hundred forty-six".