18873805159 has 4 divisors (see below), whose sum is σ = 20589605640. Its totient is φ = 17158004680.

The previous prime is 18873805141. The next prime is 18873805189. The reversal of 18873805159 is 95150837881.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 18873805159 - 2¹¹ = 18873803111 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18873805109) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 857900224 + ... + 857900245.

It is an arithmetic number, because the mean of its divisors is an integer number (5147401410).

Almost surely, 2^18873805159 is an apocalyptic number.

18873805159 is a deficient number, since it is larger than the sum of its proper divisors (1715800481).

18873805159 is a wasteful number, since it uses less digits than its factorization.

18873805159 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1715800480.

The product of its (nonzero) digits is 2419200, while the sum is 55.

The spelling of 18873805159 in words is "eighteen billion, eight hundred seventy-three million, eight hundred five thousand, one hundred fifty-nine".