18716568 has 64 divisors (see below), whose sum is σ = 50803200. Its totient is φ = 5712000.

The previous prime is 18716557. The next prime is 18716597. The reversal of 18716568 is 86561781.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 74443 + ... + 74693.

It is an arithmetic number, because the mean of its divisors is an integer number (793800).

Almost surely, 2^18716568 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 18716568, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25401600).

18716568 is an abundant number, since it is smaller than the sum of its proper divisors (32086632).

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

18716568 is a wasteful number, since it uses less digits than its factorization.

18716568 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 512 (or 508 counting only the distinct ones).

The product of its digits is 80640, while the sum is 42.

The square root of 18716568 is about 4326.2649017368. The cubic root of 18716568 is about 265.5066514625.

The spelling of 18716568 in words is "eighteen million, seven hundred sixteen thousand, five hundred sixty-eight".