19719091234 has 16 divisors (see below), whose sum is σ = 29845379520. Its totient is φ = 9770838480.

The previous prime is 19719091219. The next prime is 19719091237. The reversal of 19719091234 is 43219091791.

It is not an unprimeable number, because it can be changed into a prime (19719091237) 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, 140707 + ... + 243385.

It is an arithmetic number, because the mean of its divisors is an integer number (1865336220).

Almost surely, 2^19719091234 is an apocalyptic number.

19719091234 is a deficient number, since it is larger than the sum of its proper divisors (10126288286).

19719091234 is a wasteful number, since it uses less digits than its factorization.

19719091234 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 103545.

The product of its (nonzero) digits is 122472, while the sum is 46.

The spelling of 19719091234 in words is "nineteen billion, seven hundred nineteen million, ninety-one thousand, two hundred thirty-four".