19894 has 16 divisors (see below), whose sum is σ = 36000. Its totient is φ = 8232.

The previous prime is 19891. The next prime is 19913. The reversal of 19894 is 49891.

It is a plaindrome in base 8.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19891) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 672 + ... + 700.

It is an arithmetic number, because the mean of its divisors is an integer number (2250).

2¹⁹⁸⁹⁴ is an apocalyptic number.

19894 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

19894 is a deficient number, since it is larger than the sum of its proper divisors (16106).

19894 is an equidigital number, since it uses as much as digits as its factorization.

19894 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52 (or 38 counting only the distinct ones).

The product of its digits is 2592, while the sum is 31.

The square root of 19894 is about 141.0460917573. The cubic root of 19894 is about 27.0961364844.

It can be divided in two parts, 198 and 94, that added together give a palindrome (292).

The spelling of 19894 in words is "nineteen thousand, eight hundred ninety-four".