19419965878 has 16 divisors (see below), whose sum is σ = 30894321024. Its totient is φ = 9123742080.

The previous prime is 19419965863. The next prime is 19419965881. The reversal of 19419965878 is 87856991491.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 449853 + ... + 491128.

It is an arithmetic number, because the mean of its divisors is an integer number (1930895064).

Almost surely, 2^19419965878 is an apocalyptic number.

19419965878 is a deficient number, since it is larger than the sum of its proper divisors (11474355146).

19419965878 is a wasteful number, since it uses less digits than its factorization.

19419965878 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 941607.

The product of its digits is 39191040, while the sum is 67.

The spelling of 19419965878 in words is "nineteen billion, four hundred nineteen million, nine hundred sixty-five thousand, eight hundred seventy-eight".