18480394 has 12 divisors (see below), whose sum is σ = 29448054. Its totient is φ = 8696384.

The previous prime is 18480383. The next prime is 18480401. The reversal of 18480394 is 49308481.

It can be written as a sum of positive squares in 3 ways, for example, as 17749369 + 731025 = 4213^2 + 855^2 .

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 5 ways as a sum of consecutive naturals, for example, 15409 + ... + 16564.

Almost surely, 2^18480394 is an apocalyptic number.

18480394 is a deficient number, since it is larger than the sum of its proper divisors (10967660).

18480394 is a wasteful number, since it uses less digits than its factorization.

18480394 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32009 (or 31992 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 37.

The square root of 18480394 is about 4298.8828781440. The cubic root of 18480394 is about 264.3851605579.

The spelling of 18480394 in words is "eighteen million, four hundred eighty thousand, three hundred ninety-four".