18843079849 has 8 divisors (see below), whose sum is σ = 20557090080. Its totient is φ = 17129236800.

The previous prime is 18843079841. The next prime is 18843079883. The reversal of 18843079849 is 94897034881.

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 18843079849 - 2³ = 18843079841 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18843079841) 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, 372337 + ... + 419905.

It is an arithmetic number, because the mean of its divisors is an integer number (2569636260).

Almost surely, 2^18843079849 is an apocalyptic number.

It is an amenable number.

18843079849 is a deficient number, since it is larger than the sum of its proper divisors (1714010231).

18843079849 is a wasteful number, since it uses less digits than its factorization.

18843079849 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 83591.

The product of its (nonzero) digits is 13934592, while the sum is 61.

The spelling of 18843079849 in words is "eighteen billion, eight hundred forty-three million, seventy-nine thousand, eight hundred forty-nine".