18439247071 has 8 divisors (see below), whose sum is σ = 21078721664. Its totient is φ = 15801096600.

The previous prime is 18439247027. The next prime is 18439247207. The reversal of 18439247071 is 17074293481.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 18439247071 - 2¹³ = 18439238879 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18437247071) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 301005 + ... + 357046.

It is an arithmetic number, because the mean of its divisors is an integer number (2634840208).

Almost surely, 2^18439247071 is an apocalyptic number.

18439247071 is a deficient number, since it is larger than the sum of its proper divisors (2639474593).

18439247071 is an equidigital number, since it uses as much as digits as its factorization.

18439247071 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 662061.

The product of its (nonzero) digits is 338688, while the sum is 46.

The spelling of 18439247071 in words is "eighteen billion, four hundred thirty-nine million, two hundred forty-seven thousand, seventy-one".