19799547934 has 16 divisors (see below), whose sum is σ = 29903511456. Its totient is φ = 9831744000.

The previous prime is 19799547871. The next prime is 19799547979. The reversal of 19799547934 is 43974599791.

It is a self number, because there is not a number n which added to its sum of digits gives 19799547934.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2036974 + ... + 2046670.

It is an arithmetic number, because the mean of its divisors is an integer number (1868969466).

Almost surely, 2^19799547934 is an apocalyptic number.

19799547934 is a deficient number, since it is larger than the sum of its proper divisors (10103963522).

19799547934 is a wasteful number, since it uses less digits than its factorization.

19799547934 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16611.

The product of its digits is 77157360, while the sum is 67.

The spelling of 19799547934 in words is "nineteen billion, seven hundred ninety-nine million, five hundred forty-seven thousand, nine hundred thirty-four".