19453 has 6 divisors (see below), whose sum is σ = 22686. Its totient is φ = 16632.

The previous prime is 19447. The next prime is 19457. The reversal of 19453 is 35491.

It can be written as a sum of positive squares in only one way, i.e., 17689 + 1764 = 133^2 + 42^2 .

It is not a de Polignac number, because 19453 - 2⁵ = 19421 is a prime.

It is a Duffinian number.

It is a nialpdrome in base 12.

It is a zygodrome in base 3.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19457) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 150 + ... + 247.

It is an arithmetic number, because the mean of its divisors is an integer number (3781).

19453 is a Friedman number, since it can be written as 19*4^5-3, using all its digits and the basic arithmetic operations.

2¹⁹⁴⁵³ is an apocalyptic number.

It is an amenable number.

19453 is a deficient number, since it is larger than the sum of its proper divisors (3233).

19453 is an equidigital number, since it uses as much as digits as its factorization.

19453 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 411 (or 404 counting only the distinct ones).

The product of its digits is 540, while the sum is 22.

The square root of 19453 is about 139.4740119162. The cubic root of 19453 is about 26.8944207921.

The spelling of 19453 in words is "nineteen thousand, four hundred fifty-three".