18971248 has 10 divisors (see below), whose sum is σ = 36756824. Its totient is φ = 9485616.

The previous prime is 18971237. The next prime is 18971257. The reversal of 18971248 is 84217981.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 18971248.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 592836 + ... + 592867.

Almost surely, 2^18971248 is an apocalyptic number.

It is an amenable number.

18971248 is a deficient number, since it is larger than the sum of its proper divisors (17785576).

18971248 is a wasteful number, since it uses less digits than its factorization.

18971248 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1185711 (or 1185705 counting only the distinct ones).

The product of its digits is 32256, while the sum is 40.

The square root of 18971248 is about 4355.5996142896. The cubic root of 18971248 is about 266.7054971232.

The spelling of 18971248 in words is "eighteen million, nine hundred seventy-one thousand, two hundred forty-eight".