19896447 has 4 divisors (see below), whose sum is σ = 26528600. Its totient is φ = 13264296.

The previous prime is 19896433. The next prime is 19896479. The reversal of 19896447 is 74469891.

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

It is not a de Polignac number, because 19896447 - 2⁷ = 19896319 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 19896396 and 19896405.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19896427) 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, 3316072 + ... + 3316077.

It is an arithmetic number, because the mean of its divisors is an integer number (6632150).

Almost surely, 2^19896447 is an apocalyptic number.

19896447 is a deficient number, since it is larger than the sum of its proper divisors (6632153).

19896447 is an equidigital number, since it uses as much as digits as its factorization.

19896447 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6632152.

The product of its digits is 435456, while the sum is 48.

The square root of 19896447 is about 4460.5433525525. The cubic root of 19896447 is about 270.9724739770.

The spelling of 19896447 in words is "nineteen million, eight hundred ninety-six thousand, four hundred forty-seven".