18343568 has 30 divisors (see below), whose sum is σ = 36754902. Its totient is φ = 8868480.

The previous prime is 18343553. The next prime is 18343571. The reversal of 18343568 is 86534381.

It can be written as a sum of positive squares in only one way, i.e., 15745024 + 2598544 = 3968^2 + 1612^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 14780 + ... + 15972.

Almost surely, 2^18343568 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 18343568, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (18377451).

18343568 is an abundant number, since it is smaller than the sum of its proper divisors (18411334).

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

18343568 is a wasteful number, since it uses less digits than its factorization.

18343568 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1263 (or 1226 counting only the distinct ones).

The product of its digits is 69120, while the sum is 38.

The square root of 18343568 is about 4282.9391777143. The cubic root of 18343568 is about 263.7310545454.

The spelling of 18343568 in words is "eighteen million, three hundred forty-three thousand, five hundred sixty-eight".