18683648 has 36 divisors (see below), whose sum is σ = 37957080. Its totient is φ = 9176064.

The previous prime is 18683647. The next prime is 18683657. The reversal of 18683648 is 84638681.

It is a junction number, because it is equal to n+sod(n) for n = 18683599 and 18683608.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18683641) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14486 + ... + 15722.

Almost surely, 2^18683648 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18683648, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (18978540).

18683648 is an abundant number, since it is smaller than the sum of its proper divisors (19273432).

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

18683648 is an equidigital number, since it uses as much as digits as its factorization.

18683648 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1312 (or 1298 counting only the distinct ones).

The product of its digits is 221184, while the sum is 44.

The square root of 18683648 is about 4322.4585596625. The cubic root of 18683648 is about 265.3508962615.

The spelling of 18683648 in words is "eighteen million, six hundred eighty-three thousand, six hundred forty-eight".