18781348 has 24 divisors (see below), whose sum is σ = 35537600. Its totient is φ = 8654688.

The previous prime is 18781333. The next prime is 18781361. The reversal of 18781348 is 84318781.

It is a self number, because there is not a number n which added to its sum of digits gives 18781348.

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 in 7 ways as a sum of consecutive naturals, for example, 528 + ... + 6151.

Almost surely, 2^18781348 is an apocalyptic number.

It is an amenable number.

18781348 is a deficient number, since it is larger than the sum of its proper divisors (16756252).

18781348 is a wasteful number, since it uses less digits than its factorization.

18781348 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6739 (or 6737 counting only the distinct ones).

The product of its digits is 43008, while the sum is 40.

The square root of 18781348 is about 4333.7452624722. The cubic root of 18781348 is about 265.8126141767.

The spelling of 18781348 in words is "eighteen million, seven hundred eighty-one thousand, three hundred forty-eight".