19394 has 4 divisors (see below), whose sum is σ = 29094. Its totient is φ = 9696.

The previous prime is 19391. The next prime is 19403. The reversal of 19394 is 49391.

It is a happy number.

19394 is nontrivially palindromic in base 11.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 18769 + 625 = 137^2 + 25^2 .

It is a super-2 number, since 2×19394² = 752254472, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (19391) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4847 + ... + 4850.

2¹⁹³⁹⁴ is an apocalyptic number.

19394 is a deficient number, since it is larger than the sum of its proper divisors (9700).

19394 is an equidigital number, since it uses as much as digits as its factorization.

19394 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9699.

The product of its digits is 972, while the sum is 26.

The square root of 19394 is about 139.2623423615. The cubic root of 19394 is about 26.8672034352.

The spelling of 19394 in words is "nineteen thousand, three hundred ninety-four".