19894999347 has 6 divisors (see below), whose sum is σ = 28737221292. Its totient is φ = 13263332892.

The previous prime is 19894999339. The next prime is 19894999357. The reversal of 19894999347 is 74399949891.

19894999347 is a `hidden beast` number, since 1 + 9 + 8 + 9 + 499 + 93 + 47 = 666.

It is not a de Polignac number, because 19894999347 - 2³ = 19894999339 is a prime.

It is not an unprimeable number, because it can be changed into a prime (19894999307) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1105277733 + ... + 1105277750.

It is an arithmetic number, because the mean of its divisors is an integer number (4789536882).

Almost surely, 2^19894999347 is an apocalyptic number.

19894999347 is a deficient number, since it is larger than the sum of its proper divisors (8842221945).

19894999347 is a wasteful number, since it uses less digits than its factorization.

19894999347 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2210555489 (or 2210555486 counting only the distinct ones).

The product of its digits is 158723712, while the sum is 72.

The spelling of 19894999347 in words is "nineteen billion, eight hundred ninety-four million, nine hundred ninety-nine thousand, three hundred forty-seven".