19439209228 has 6 divisors (see below), whose sum is σ = 34018616156. Its totient is φ = 9719604612.

The previous prime is 19439209213. The next prime is 19439209289. The reversal of 19439209228 is 82290293491.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2429901150 + ... + 2429901157.

Almost surely, 2^19439209228 is an apocalyptic number.

It is an amenable number.

19439209228 is a deficient number, since it is larger than the sum of its proper divisors (14579406928).

19439209228 is a wasteful number, since it uses less digits than its factorization.

19439209228 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4859802311 (or 4859802309 counting only the distinct ones).

The product of its (nonzero) digits is 559872, while the sum is 49.

The spelling of 19439209228 in words is "nineteen billion, four hundred thirty-nine million, two hundred nine thousand, two hundred twenty-eight".