18144220571 has 2 divisors, whose sum is σ = 18144220572. Its totient is φ = 18144220570.

The previous prime is 18144220559. The next prime is 18144220573. The reversal of 18144220571 is 17502244181.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 18144220571 - 2¹⁴ = 18144204187 is a prime.

Together with 18144220573, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (18144220573) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9072110285 + 9072110286.

It is an arithmetic number, because the mean of its divisors is an integer number (9072110286).

Almost surely, 2^18144220571 is an apocalyptic number.

18144220571 is a deficient number, since it is larger than the sum of its proper divisors (1).

18144220571 is an equidigital number, since it uses as much as digits as its factorization.

18144220571 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 17920, while the sum is 35.

The spelling of 18144220571 in words is "eighteen billion, one hundred forty-four million, two hundred twenty thousand, five hundred seventy-one".