19896671 has 4 divisors (see below), whose sum is σ = 19905600. Its totient is φ = 19887744.

The previous prime is 19896649. The next prime is 19896689. The reversal of 19896671 is 17669891.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 17669891 = 127 ⋅139133.

It is a cyclic number.

It is not a de Polignac number, because 19896671 - 2⁶ = 19896607 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19896601) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1970 + ... + 6608.

It is an arithmetic number, because the mean of its divisors is an integer number (4976400).

Almost surely, 2^19896671 is an apocalyptic number.

19896671 is a deficient number, since it is larger than the sum of its proper divisors (8929).

19896671 is an equidigital number, since it uses as much as digits as its factorization.

19896671 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8928.

The product of its digits is 163296, while the sum is 47.

The square root of 19896671 is about 4460.5684615304. The cubic root of 19896671 is about 270.9734908688.

It can be divided in two parts, 198 and 96671, that added together give a palindrome (96869).

The spelling of 19896671 in words is "nineteen million, eight hundred ninety-six thousand, six hundred seventy-one".