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19308 = 2231609

19308 has 12 divisors (see below), whose sum is σ = 45080. Its totient is φ = 6432.

The previous prime is 19301. The next prime is 19309. The reversal of 19308 is 80391.

Adding to 19308 its reverse (80391), we get a palindrome (99699).

19308 is nontrivially palindromic in base 8.

19308 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (12).

It is a hoax number, since the sum of its digits (21) coincides with the sum of the digits of its distinct prime factors.

It is a nialpdrome in base 12.

It is not an unprimeable number, because it can be changed into a prime (19301) by changing a digit.

19308 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 793 + ... + 816.

219308 is an apocalyptic number.

It is an amenable number.

19308 is an abundant number, since it is smaller than the sum of its proper divisors (25772).

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

It is a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22540).

19308 is a wasteful number, since it uses less digits than its factorization.

19308 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1616 (or 1614 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 21.

The square root of 19308 is about 138.9532295415. The cubic root of 19308 is about 26.8274316286.

The spelling of 19308 in words is "nineteen thousand, three hundred eight".

Divisors: 1 2 3 4 6 12 1609 3218 4827 6436 9654 19308