18819648 has 56 divisors (see below), whose sum is σ = 55331360. Its totient is φ = 6272640.

The previous prime is 18819631. The next prime is 18819653. The reversal of 18819648 is 84691881.

It is a nude number because it is divisible by every one of its digits.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3718 + ... + 7173.

It is an arithmetic number, because the mean of its divisors is an integer number (988060).

Almost surely, 2^18819648 is an apocalyptic number.

18819648 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

18819648 is an abundant number, since it is smaller than the sum of its proper divisors (36511712).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

18819648 is a wasteful number, since it uses less digits than its factorization.

18819648 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10912 (or 10896 counting only the distinct ones).

The product of its digits is 110592, while the sum is 45.

The square root of 18819648 is about 4338.1618227079. The cubic root of 18819648 is about 265.9931782599.

The spelling of 18819648 in words is "eighteen million, eight hundred nineteen thousand, six hundred forty-eight".