19678879131 has 16 divisors (see below), whose sum is σ = 27182645760. Its totient is φ = 12648494880.

The previous prime is 19678879127. The next prime is 19678879133. The reversal of 19678879131 is 13197887691.

It is not a de Polignac number, because 19678879131 - 2² = 19678879127 is a prime.

It is a super-2 number, since 2×19678879131² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (19678879133) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 103555 + ... + 223788.

It is an arithmetic number, because the mean of its divisors is an integer number (1698915360).

Almost surely, 2^19678879131 is an apocalyptic number.

19678879131 is a deficient number, since it is larger than the sum of its proper divisors (7503766629).

19678879131 is a wasteful number, since it uses less digits than its factorization.

19678879131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 328066.

The product of its digits is 4572288, while the sum is 60.

The spelling of 19678879131 in words is "nineteen billion, six hundred seventy-eight million, eight hundred seventy-nine thousand, one hundred thirty-one".