18968568 has 64 divisors (see below), whose sum is σ = 49986720. Its totient is φ = 5990400.

The previous prime is 18968567. The next prime is 18968569. The reversal of 18968568 is 86586981.

It is an interprime number because it is at equal distance from previous prime (18968567) and next prime (18968569).

It is a self number, because there is not a number n which added to its sum of digits gives 18968568.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18968561) 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, 36148 + ... + 36668.

Almost surely, 2^18968568 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 18968568, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24993360).

18968568 is an abundant number, since it is smaller than the sum of its proper divisors (31018152).

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

18968568 is a wasteful number, since it uses less digits than its factorization.

18968568 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 608 (or 604 counting only the distinct ones).

The product of its digits is 829440, while the sum is 51.

The square root of 18968568 is about 4355.2919534745. The cubic root of 18968568 is about 266.6929376896.

The spelling of 18968568 in words is "eighteen million, nine hundred sixty-eight thousand, five hundred sixty-eight".