19994278106 has 32 divisors (see below), whose sum is σ = 32862246912. Its totient is φ = 9048301360.

The previous prime is 19994278091. The next prime is 19994278169. The reversal of 19994278106 is 60187249991.

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6311735 + ... + 6314901.

It is an arithmetic number, because the mean of its divisors is an integer number (1026945216).

Almost surely, 2^19994278106 is an apocalyptic number.

19994278106 is a deficient number, since it is larger than the sum of its proper divisors (12867968806).

19994278106 is a wasteful number, since it uses less digits than its factorization.

19994278106 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4354.

The product of its (nonzero) digits is 1959552, while the sum is 56.

The spelling of 19994278106 in words is "nineteen billion, nine hundred ninety-four million, two hundred seventy-eight thousand, one hundred six".