18618496 has 64 divisors (see below), whose sum is σ = 40783680. Its totient is φ = 8414208.

The previous prime is 18618463. The next prime is 18618503. The reversal of 18618496 is 69481681.

It is a tau number, because it is divible by the number of its divisors (64).

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 111405 + ... + 111571.

It is an arithmetic number, because the mean of its divisors is an integer number (637245).

Almost surely, 2^18618496 is an apocalyptic number.

18618496 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 18618496, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20391840).

18618496 is an abundant number, since it is smaller than the sum of its proper divisors (22165184).

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

18618496 is a wasteful number, since it uses less digits than its factorization.

18618496 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 261 (or 249 counting only the distinct ones).

The product of its digits is 82944, while the sum is 43.

The square root of 18618496 is about 4314.9155264037. The cubic root of 18618496 is about 265.0421008226.

The spelling of 18618496 in words is "eighteen million, six hundred eighteen thousand, four hundred ninety-six".