19194699659 has 4 divisors (see below), whose sum is σ = 19196061000. Its totient is φ = 19193338320.

The previous prime is 19194699653. The next prime is 19194699683. The reversal of 19194699659 is 95699649191.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-19194699659 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (19194699653) 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, 659297 + ... + 687794.

It is an arithmetic number, because the mean of its divisors is an integer number (4799015250).

Almost surely, 2^19194699659 is an apocalyptic number.

19194699659 is a deficient number, since it is larger than the sum of its proper divisors (1361341).

19194699659 is a wasteful number, since it uses less digits than its factorization.

19194699659 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1361340.

The product of its digits is 42515280, while the sum is 68.

The spelling of 19194699659 in words is "nineteen billion, one hundred ninety-four million, six hundred ninety-nine thousand, six hundred fifty-nine".