18696816 has 60 divisors (see below), whose sum is σ = 52722072. Its totient is φ = 6185088.

The previous prime is 18696791. The next prime is 18696841. The reversal of 18696816 is 61869681.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (18696791) and next prime (18696841).

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 22195 + ... + 23021.

Almost surely, 2^18696816 is an apocalyptic number.

18696816 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 18696816, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26361036).

18696816 is an abundant number, since it is smaller than the sum of its proper divisors (34025256).

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

18696816 is a wasteful number, since it uses less digits than its factorization.

18696816 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 998 (or 989 counting only the distinct ones).

The product of its digits is 124416, while the sum is 45.

The square root of 18696816 is about 4323.9814985728. The cubic root of 18696816 is about 265.4132202796.

The spelling of 18696816 in words is "eighteen million, six hundred ninety-six thousand, eight hundred sixteen".