19677994426 has 16 divisors (see below), whose sum is σ = 29775052800. Its totient is φ = 9753110640.

The previous prime is 19677994417. The next prime is 19677994433. The reversal of 19677994426 is 62449977691.

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 7 ways as a sum of consecutive naturals, for example, 267175 + ... + 332773.

It is an arithmetic number, because the mean of its divisors is an integer number (1860940800).

Almost surely, 2^19677994426 is an apocalyptic number.

19677994426 is a deficient number, since it is larger than the sum of its proper divisors (10097058374).

19677994426 is a wasteful number, since it uses less digits than its factorization.

19677994426 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66909.

The product of its digits is 41150592, while the sum is 64.

The spelling of 19677994426 in words is "nineteen billion, six hundred seventy-seven million, nine hundred ninety-four thousand, four hundred twenty-six".