19494 has 24 divisors (see below), whose sum is σ = 45720. Its totient is φ = 6156.

The previous prime is 19489. The next prime is 19501. The reversal of 19494 is 49491.

It is a Harshad number since it is a multiple of its sum of digits (27).

Its product of digits (1296) is a multiple of the sum of its prime divisors (24).

It is a congruent number.

It is an unprimeable number.

19494 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 11 ways as a sum of consecutive naturals, for example, 1017 + ... + 1035.

It is an arithmetic number, because the mean of its divisors is an integer number (1905).

2¹⁹⁴⁹⁴ is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 19494, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22860).

19494 is an abundant number, since it is smaller than the sum of its proper divisors (26226).

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

19494 is a wasteful number, since it uses less digits than its factorization.

19494 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49 (or 24 counting only the distinct ones).

The product of its digits is 1296, while the sum is 27.

The square root of 19494 is about 139.6209153386. The cubic root of 19494 is about 26.9133021554.

It can be divided in two parts, 1949 and 4, that added together give a triangular number (1953 = T₆₂).

The spelling of 19494 in words is "nineteen thousand, four hundred ninety-four".