19842729867 has 16 divisors (see below), whose sum is σ = 29401092480. Its totient is φ = 13226481576.

The previous prime is 19842729859. The next prime is 19842729877. The reversal of 19842729867 is 76892724891.

It is not a de Polignac number, because 19842729867 - 2³ = 19842729859 is a prime.

It is not an unprimeable number, because it can be changed into a prime (19842729847) 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 15 ways as a sum of consecutive naturals, for example, 137988 + ... + 242334.

It is an arithmetic number, because the mean of its divisors is an integer number (1837568280).

Almost surely, 2^19842729867 is an apocalyptic number.

19842729867 is a deficient number, since it is larger than the sum of its proper divisors (9558362613).

19842729867 is a wasteful number, since it uses less digits than its factorization.

19842729867 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 111399 (or 111393 counting only the distinct ones).

The product of its digits is 24385536, while the sum is 63.

The spelling of 19842729867 in words is "nineteen billion, eight hundred forty-two million, seven hundred twenty-nine thousand, eight hundred sixty-seven".