18443193347 has 8 divisors (see below), whose sum is σ = 18560646720. Its totient is φ = 18326076160.

The previous prime is 18443193331. The next prime is 18443193361. The reversal of 18443193347 is 74339134481.

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 18443193347 - 2⁴ = 18443193331 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18443193947) 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, 26483 + ... + 193875.

It is an arithmetic number, because the mean of its divisors is an integer number (2320080840).

Almost surely, 2^18443193347 is an apocalyptic number.

18443193347 is a deficient number, since it is larger than the sum of its proper divisors (117453373).

18443193347 is a wasteful number, since it uses less digits than its factorization.

18443193347 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 168093.

The product of its digits is 870912, while the sum is 47.

The spelling of 18443193347 in words is "eighteen billion, four hundred forty-three million, one hundred ninety-three thousand, three hundred forty-seven".