18813696 has 144 divisors (see below), whose sum is σ = 58278528. Its totient is φ = 5324800.

The previous prime is 18813689. The next prime is 18813731. The reversal of 18813696 is 69631881.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 143551 + ... + 143681.

It is an arithmetic number, because the mean of its divisors is an integer number (404712).

Almost surely, 2^18813696 is an apocalyptic number.

18813696 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 18813696, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29139264).

18813696 is an abundant number, since it is smaller than the sum of its proper divisors (39464832).

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

18813696 is a wasteful number, since it uses less digits than its factorization.

18813696 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 178 (or 164 counting only the distinct ones).

The product of its digits is 62208, while the sum is 42.

The square root of 18813696 is about 4337.4757636210. The cubic root of 18813696 is about 265.9651338400.

The spelling of 18813696 in words is "eighteen million, eight hundred thirteen thousand, six hundred ninety-six".