19978934822 has 32 divisors (see below), whose sum is σ = 37508659200. Its totient is φ = 7753697280.

The previous prime is 19978934783. The next prime is 19978934933. The reversal of 19978934822 is 22843987991.

It is a congruent 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, 212822 + ... + 291977.

It is an arithmetic number, because the mean of its divisors is an integer number (1172145600).

Almost surely, 2^19978934822 is an apocalyptic number.

19978934822 is a deficient number, since it is larger than the sum of its proper divisors (17529724378).

19978934822 is a wasteful number, since it uses less digits than its factorization.

19978934822 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 505076.

The product of its digits is 15676416, while the sum is 62.

The spelling of 19978934822 in words is "nineteen billion, nine hundred seventy-eight million, nine hundred thirty-four thousand, eight hundred twenty-two".