18893984 has 12 divisors (see below), whose sum is σ = 37197594. Its totient is φ = 9446976.

The previous prime is 18893981. The next prime is 18894019. The reversal of 18893984 is 48939881.

It can be written as a sum of positive squares in only one way, i.e., 17405584 + 1488400 = 4172^2 + 1220^2 .

It is not an unprimeable number, because it can be changed into a prime (18893981) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 295187 + ... + 295250.

Almost surely, 2^18893984 is an apocalyptic number.

It is an amenable number.

18893984 is a deficient number, since it is larger than the sum of its proper divisors (18303610).

18893984 is an equidigital number, since it uses as much as digits as its factorization.

18893984 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 590447 (or 590439 counting only the distinct ones).

The product of its digits is 497664, while the sum is 50.

The square root of 18893984 is about 4346.7210630543. The cubic root of 18893984 is about 266.3429349284.

The spelling of 18893984 in words is "eighteen million, eight hundred ninety-three thousand, nine hundred eighty-four".