18647241311 has 4 divisors (see below), whose sum is σ = 18647514552. Its totient is φ = 18646968072.

The previous prime is 18647241289. The next prime is 18647241313. The reversal of 18647241311 is 11314274681.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 18647241311 - 2¹⁴ = 18647224927 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18647241313) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 61985 + ... + 202821.

It is an arithmetic number, because the mean of its divisors is an integer number (4661878638).

Almost surely, 2^18647241311 is an apocalyptic number.

18647241311 is a deficient number, since it is larger than the sum of its proper divisors (273241).

18647241311 is a wasteful number, since it uses less digits than its factorization.

18647241311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 273240.

The product of its digits is 32256, while the sum is 38.

The spelling of 18647241311 in words is "eighteen billion, six hundred forty-seven million, two hundred forty-one thousand, three hundred eleven".