18450471239 has 2 divisors, whose sum is σ = 18450471240. Its totient is φ = 18450471238.

The previous prime is 18450471181. The next prime is 18450471253. The reversal of 18450471239 is 93217405481.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 18450471239 - 2²⁴ = 18433694023 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 18450471239.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18450431239) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9225235619 + 9225235620.

It is an arithmetic number, because the mean of its divisors is an integer number (9225235620).

Almost surely, 2^18450471239 is an apocalyptic number.

18450471239 is a deficient number, since it is larger than the sum of its proper divisors (1).

18450471239 is an equidigital number, since it uses as much as digits as its factorization.

18450471239 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 241920, while the sum is 44.

The spelling of 18450471239 in words is "eighteen billion, four hundred fifty million, four hundred seventy-one thousand, two hundred thirty-nine".