18471439444343 has 4 divisors (see below), whose sum is σ = 18505208072760. Its totient is φ = 18437670815928.

The previous prime is 18471439444333. The next prime is 18471439444349. The reversal of 18471439444343 is 34344493417481.

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 18471439444343 - 2¹⁸ = 18471439182199 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 (18471439444349) 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, 16884313388 + ... + 16884314481.

It is an arithmetic number, because the mean of its divisors is an integer number (4626302018190).

Almost surely, 2^{18471439444343} is an apocalyptic number.

18471439444343 is a deficient number, since it is larger than the sum of its proper divisors (33768628417).

18471439444343 is an equidigital number, since it uses as much as digits as its factorization.

18471439444343 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33768628416.

The product of its digits is 55738368, while the sum is 59.

The spelling of 18471439444343 in words is "eighteen trillion, four hundred seventy-one billion, four hundred thirty-nine million, four hundred forty-four thousand, three hundred forty-three".