18936448 has 32 divisors (see below), whose sum is σ = 37944000. Its totient is φ = 9413376.

The previous prime is 18936433. The next prime is 18936451. The reversal of 18936448 is 84463981.

It is a tau number, because it is divible by the number of its divisors (32).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 30283 + ... + 30901.

It is an arithmetic number, because the mean of its divisors is an integer number (1185750).

Almost surely, 2^18936448 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 18936448, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (18972000).

18936448 is an abundant number, since it is smaller than the sum of its proper divisors (19007552).

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

18936448 is an equidigital number, since it uses as much as digits as its factorization.

18936448 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 872 (or 860 counting only the distinct ones).

The product of its digits is 165888, while the sum is 43.

The square root of 18936448 is about 4351.6029230618. The cubic root of 18936448 is about 266.5423198038.

The spelling of 18936448 in words is "eighteen million, nine hundred thirty-six thousand, four hundred forty-eight".