18843873867 has 24 divisors (see below), whose sum is σ = 33500221664. Its totient is φ = 9939625344.

The previous prime is 18843873863. The next prime is 18843873901. The reversal of 18843873867 is 76837834881.

It is not a de Polignac number, because 18843873867 - 2² = 18843873863 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is not an unprimeable number, because it can be changed into a prime (18843873863) 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 23 ways as a sum of consecutive naturals, for example, 11503378 + ... + 11505015.

Almost surely, 2^18843873867 is an apocalyptic number.

18843873867 is a deficient number, since it is larger than the sum of its proper divisors (14656347797).

18843873867 is a wasteful number, since it uses less digits than its factorization.

18843873867 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23008419 (or 23008416 counting only the distinct ones).

The product of its digits is 43352064, while the sum is 63.

The spelling of 18843873867 in words is "eighteen billion, eight hundred forty-three million, eight hundred seventy-three thousand, eight hundred sixty-seven".