18879435849 has 8 divisors (see below), whose sum is σ = 25188135840. Its totient is φ = 12578513216.

The previous prime is 18879435847. The next prime is 18879435853. The reversal of 18879435849 is 94853497881.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 18879435849 - 2¹ = 18879435847 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 18879435849.

It is not an unprimeable number, because it can be changed into a prime (18879435847) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1938672 + ... + 1948385.

It is an arithmetic number, because the mean of its divisors is an integer number (3148516980).

Almost surely, 2^18879435849 is an apocalyptic number.

It is an amenable number.

18879435849 is a deficient number, since it is larger than the sum of its proper divisors (6308699991).

18879435849 is a wasteful number, since it uses less digits than its factorization.

18879435849 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3888679.

The product of its digits is 69672960, while the sum is 66.

The spelling of 18879435849 in words is "eighteen billion, eight hundred seventy-nine million, four hundred thirty-five thousand, eight hundred forty-nine".