18347527966 has 4 divisors (see below), whose sum is σ = 27521291952. Its totient is φ = 9173763982.

The previous prime is 18347527963. The next prime is 18347527997. The reversal of 18347527966 is 66972574381.

It is a semiprime because it is the product of two primes.

It is a Smith number, since the sum of its digits (58) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a self number, because there is not a number n which added to its sum of digits gives 18347527966.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18347527963) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4586881990 + ... + 4586881993.

It is an arithmetic number, because the mean of its divisors is an integer number (6880322988).

Almost surely, 2^18347527966 is an apocalyptic number.

18347527966 is a deficient number, since it is larger than the sum of its proper divisors (9173763986).

18347527966 is an equidigital number, since it uses as much as digits as its factorization.

18347527966 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9173763985.

The product of its digits is 15240960, while the sum is 58.

The spelling of 18347527966 in words is "eighteen billion, three hundred forty-seven million, five hundred twenty-seven thousand, nine hundred sixty-six".