19217839338 has 12 divisors (see below), whose sum is σ = 41638651938. Its totient is φ = 6405946440.

The previous prime is 19217839327. The next prime is 19217839357. The reversal of 19217839338 is 83393871291.

19217839338 is a `hidden beast` number, since 1 + 9 + 217 + 8 + 393 + 38 = 666.

It can be written as a sum of positive squares in only one way, i.e., 9635974569 + 9581864769 = 98163^2 + 97887^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 533828853 + ... + 533828888.

Almost surely, 2^19217839338 is an apocalyptic number.

19217839338 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

19217839338 is an abundant number, since it is smaller than the sum of its proper divisors (22420812600).

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

19217839338 is a wasteful number, since it uses less digits than its factorization.

19217839338 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1067657749 (or 1067657746 counting only the distinct ones).

The product of its digits is 1959552, while the sum is 54.

The spelling of 19217839338 in words is "nineteen billion, two hundred seventeen million, eight hundred thirty-nine thousand, three hundred thirty-eight".