18500048 has 40 divisors (see below), whose sum is σ = 41812800. Its totient is φ = 7926240.

The previous prime is 18500047. The next prime is 18500051. The reversal of 18500048 is 84000581.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18500047) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3803 + ... + 7173.

It is an arithmetic number, because the mean of its divisors is an integer number (1045320).

Almost surely, 2^18500048 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 18500048, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20906400).

18500048 is an abundant number, since it is smaller than the sum of its proper divisors (23312752).

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

18500048 is an equidigital number, since it uses as much as digits as its factorization.

18500048 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3400 (or 3380 counting only the distinct ones).

The product of its (nonzero) digits is 1280, while the sum is 26.

The square root of 18500048 is about 4301.1682134044. The cubic root of 18500048 is about 264.4788523728.

The spelling of 18500048 in words is "eighteen million, five hundred thousand, forty-eight".