18548816 has 80 divisors (see below), whose sum is σ = 43205568. Its totient is φ = 7666560.

The previous prime is 18548813. The next prime is 18548869. The reversal of 18548816 is 61884581.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18548813) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 276815 + ... + 276881.

Almost surely, 2^18548816 is an apocalyptic number.

18548816 is a gapful number since it is divisible by the number (16) 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 18548816, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21602784).

18548816 is an abundant number, since it is smaller than the sum of its proper divisors (24656752).

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

18548816 is a wasteful number, since it uses less digits than its factorization.

18548816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 121 (or 93 counting only the distinct ones).

The product of its digits is 61440, while the sum is 41.

The square root of 18548816 is about 4306.8336396940. The cubic root of 18548816 is about 264.7110461428.

The spelling of 18548816 in words is "eighteen million, five hundred forty-eight thousand, eight hundred sixteen".