19694219008 has 36 divisors (see below), whose sum is σ = 39320513848. Its totient is φ = 9844853760.

The previous prime is 19694218987. The next prime is 19694219009. The reversal of 19694219008 is 80091249691.

It is a happy number.

It is a hoax number, since the sum of its digits (49) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19694219009) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2033698 + ... + 2043358.

Almost surely, 2^19694219008 is an apocalyptic number.

It is an amenable number.

19694219008 is a deficient number, since it is larger than the sum of its proper divisors (19626294840).

19694219008 is an frugal number, since it uses more digits than its factorization.

19694219008 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17640 (or 17626 counting only the distinct ones).

The product of its (nonzero) digits is 279936, while the sum is 49.

The spelling of 19694219008 in words is "nineteen billion, six hundred ninety-four million, two hundred nineteen thousand, eight".