18443271323 has 2 divisors, whose sum is σ = 18443271324. Its totient is φ = 18443271322.

The previous prime is 18443271299. The next prime is 18443271373. The reversal of 18443271323 is 32317234481.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 18443271323 - 2¹⁰ = 18443270299 is a prime.

It is not a weakly prime, because it can be changed into another prime (18443271373) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9221635661 + 9221635662.

It is an arithmetic number, because the mean of its divisors is an integer number (9221635662).

Almost surely, 2^18443271323 is an apocalyptic number.

18443271323 is a deficient number, since it is larger than the sum of its proper divisors (1).

18443271323 is an equidigital number, since it uses as much as digits as its factorization.

18443271323 is an evil number, because the sum of its binary digits is even.

The product of its digits is 96768, while the sum is 38.

The spelling of 18443271323 in words is "eighteen billion, four hundred forty-three million, two hundred seventy-one thousand, three hundred twenty-three".