18182716368 has 80 divisors (see below), whose sum is σ = 49466387520. Its totient is φ = 5739337728.

The previous prime is 18182716313. The next prime is 18182716369. The reversal of 18182716368 is 86361728181.

It is a happy number.

It is a super-2 number, since 2×18182716368² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 18182716368.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18182716369) 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, 3953046 + ... + 3957642.

It is an arithmetic number, because the mean of its divisors is an integer number (618329844).

Almost surely, 2^18182716368 is an apocalyptic number.

It is an amenable number.

18182716368 is an abundant number, since it is smaller than the sum of its proper divisors (31283671152).

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

18182716368 is a wasteful number, since it uses less digits than its factorization.

18182716368 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8964 (or 8958 counting only the distinct ones).

The product of its digits is 774144, while the sum is 51.

The spelling of 18182716368 in words is "eighteen billion, one hundred eighty-two million, seven hundred sixteen thousand, three hundred sixty-eight".