19659191934 has 16 divisors (see below), whose sum is σ = 39331662480. Its totient is φ = 6550850880.

The previous prime is 19659191821. The next prime is 19659191939. The reversal of 19659191934 is 43919195691.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19659191939) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 533977 + ... + 569604.

It is an arithmetic number, because the mean of its divisors is an integer number (2458228905).

Almost surely, 2^19659191934 is an apocalyptic number.

19659191934 is an abundant number, since it is smaller than the sum of its proper divisors (19672470546).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

19659191934 is a wasteful number, since it uses less digits than its factorization.

19659191934 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1106555.

The product of its digits is 2361960, while the sum is 57.

The spelling of 19659191934 in words is "nineteen billion, six hundred fifty-nine million, one hundred ninety-one thousand, nine hundred thirty-four".