18443600843 has 12 divisors (see below), whose sum is σ = 18924825504. Its totient is φ = 17974334400.

The previous prime is 18443600839. The next prime is 18443600881. The reversal of 18443600843 is 34800634481.

It is not a de Polignac number, because 18443600843 - 2² = 18443600839 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (41).

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 18443600843.

It is not an unprimeable number, because it can be changed into a prime (18443600743) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1697438 + ... + 1708268.

It is an arithmetic number, because the mean of its divisors is an integer number (1577068792).

Almost surely, 2^18443600843 is an apocalyptic number.

18443600843 is a deficient number, since it is larger than the sum of its proper divisors (481224661).

18443600843 is a wasteful number, since it uses less digits than its factorization.

18443600843 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11926 (or 11885 counting only the distinct ones).

The product of its (nonzero) digits is 221184, while the sum is 41.

The spelling of 18443600843 in words is "eighteen billion, four hundred forty-three million, six hundred thousand, eight hundred forty-three".