19678142078 has 32 divisors (see below), whose sum is σ = 34651044864. Its totient is φ = 8206294752.

The previous prime is 19678142059. The next prime is 19678142119. The reversal of 19678142078 is 87024187691.

It is a happy number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 27401 + ... + 200267.

It is an arithmetic number, because the mean of its divisors is an integer number (1082845152).

Almost surely, 2^19678142078 is an apocalyptic number.

19678142078 is a deficient number, since it is larger than the sum of its proper divisors (14972902786).

19678142078 is a wasteful number, since it uses less digits than its factorization.

19678142078 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 173096.

The product of its (nonzero) digits is 1354752, while the sum is 53.

The spelling of 19678142078 in words is "nineteen billion, six hundred seventy-eight million, one hundred forty-two thousand, seventy-eight".