19438044419 has 2 divisors, whose sum is σ = 19438044420. Its totient is φ = 19438044418.

The previous prime is 19438044407. The next prime is 19438044473. The reversal of 19438044419 is 91444083491.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 19438044419 - 2⁴ = 19438044403 is a prime.

It is a super-3 number, since 3×19438044419³ (a number of 32 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is not a weakly prime, because it can be changed into another prime (19438044719) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9719022209 + 9719022210.

It is an arithmetic number, because the mean of its divisors is an integer number (9719022210).

Almost surely, 2^19438044419 is an apocalyptic number.

19438044419 is a deficient number, since it is larger than the sum of its proper divisors (1).

19438044419 is an equidigital number, since it uses as much as digits as its factorization.

19438044419 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 497664, while the sum is 47.

The spelling of 19438044419 in words is "nineteen billion, four hundred thirty-eight million, forty-four thousand, four hundred nineteen".