18013711223 has 2 divisors, whose sum is σ = 18013711224. Its totient is φ = 18013711222.

The previous prime is 18013711193. The next prime is 18013711271. The reversal of 18013711223 is 32211731081.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 18013711223 - 2³⁰ = 16939969399 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18013711283) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9006855611 + 9006855612.

It is an arithmetic number, because the mean of its divisors is an integer number (9006855612).

Almost surely, 2^18013711223 is an apocalyptic number.

18013711223 is a deficient number, since it is larger than the sum of its proper divisors (1).

18013711223 is an equidigital number, since it uses as much as digits as its factorization.

18013711223 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2016, while the sum is 29.

The spelling of 18013711223 in words is "eighteen billion, thirteen million, seven hundred eleven thousand, two hundred twenty-three".