19671 has 8 divisors (see below), whose sum is σ = 26880. Its totient is φ = 12792.

The previous prime is 19661. The next prime is 19681. The reversal of 19671 is 17691.

It is an interprime number because it is at equal distance from previous prime (19661) and next prime (19681).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 19671 - 2⁷ = 19543 is a prime.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 19671.

It is not an unprimeable number, because it can be changed into a prime (19661) 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, 196 + ... + 278.

It is an arithmetic number, because the mean of its divisors is an integer number (3360).

2¹⁹⁶⁷¹ is an apocalyptic number.

19671 is a deficient number, since it is larger than the sum of its proper divisors (7209).

19671 is an equidigital number, since it uses as much as digits as its factorization.

19671 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 165.

The product of its digits is 378, while the sum is 24.

The square root of 19671 is about 140.2533422062. The cubic root of 19671 is about 26.9945119161.

The spelling of 19671 in words is "nineteen thousand, six hundred seventy-one".