18819484 has 6 divisors (see below), whose sum is σ = 32934104. Its totient is φ = 9409740.

The previous prime is 18819461. The next prime is 18819487. The reversal of 18819484 is 48491881.

It is a self number, because there is not a number n which added to its sum of digits gives 18819484.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18819487) 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 as a sum of consecutive naturals, namely, 2352432 + ... + 2352439.

Almost surely, 2^18819484 is an apocalyptic number.

It is an amenable number.

18819484 is a deficient number, since it is larger than the sum of its proper divisors (14114620).

18819484 is a wasteful number, since it uses less digits than its factorization.

18819484 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4704875 (or 4704873 counting only the distinct ones).

The product of its digits is 73728, while the sum is 43.

The square root of 18819484 is about 4338.1429206516. The cubic root of 18819484 is about 265.9924056098.

The spelling of 18819484 in words is "eighteen million, eight hundred nineteen thousand, four hundred eighty-four".