18747648 has 108 divisors (see below), whose sum is σ = 55269760. Its totient is φ = 6110208.

The previous prime is 18747611. The next prime is 18747649. The reversal of 18747648 is 84674781.

It is not an unprimeable number, because it can be changed into a prime (18747649) 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 in 11 ways as a sum of consecutive naturals, for example, 181965 + ... + 182067.

Almost surely, 2^18747648 is an apocalyptic number.

18747648 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18747648, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27634880).

18747648 is an abundant number, since it is smaller than the sum of its proper divisors (36522112).

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

18747648 is a wasteful number, since it uses less digits than its factorization.

18747648 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 204 (or 187 counting only the distinct ones).

The product of its digits is 301056, while the sum is 45.

The square root of 18747648 is about 4329.8554248381. The cubic root of 18747648 is about 265.6535335069.

The spelling of 18747648 in words is "eighteen million, seven hundred forty-seven thousand, six hundred forty-eight".