19968419 has 4 divisors (see below), whose sum is σ = 20508144. Its totient is φ = 19428696.

The previous prime is 19968409. The next prime is 19968437. The reversal of 19968419 is 91486991.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 91486991 = 929 ⋅98479.

It is a cyclic number.

It is not a de Polignac number, because 19968419 - 2¹² = 19964323 is a prime.

It is a super-2 number, since 2×19968419² = 797475514719122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (19968409) 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 3 ways as a sum of consecutive naturals, for example, 269807 + ... + 269880.

It is an arithmetic number, because the mean of its divisors is an integer number (5127036).

Almost surely, 2^19968419 is an apocalyptic number.

19968419 is a deficient number, since it is larger than the sum of its proper divisors (539725).

19968419 is an equidigital number, since it uses as much as digits as its factorization.

19968419 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 539724.

The product of its digits is 139968, while the sum is 47.

The square root of 19968419 is about 4468.6036969058. The cubic root of 19968419 is about 271.2988130208.

The spelling of 19968419 in words is "nineteen million, nine hundred sixty-eight thousand, four hundred nineteen".