18893688 has 64 divisors (see below), whose sum is σ = 52444800. Its totient is φ = 5623680.

The previous prime is 18893687. The next prime is 18893711. The reversal of 18893688 is 88639881.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 18893688.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18893683) 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, 14970 + ... + 16182.

It is an arithmetic number, because the mean of its divisors is an integer number (819450).

Almost surely, 2^18893688 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 18893688, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26222400).

18893688 is an abundant number, since it is smaller than the sum of its proper divisors (33551112).

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

18893688 is a wasteful number, since it uses less digits than its factorization.

18893688 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1292 (or 1288 counting only the distinct ones).

The product of its digits is 663552, while the sum is 51.

The square root of 18893688 is about 4346.6870142673. The cubic root of 18893688 is about 266.3415440462.

The spelling of 18893688 in words is "eighteen million, eight hundred ninety-three thousand, six hundred eighty-eight".