18068184871 has 4 divisors (see below), whose sum is σ = 19710747144. Its totient is φ = 16425622600.

The previous prime is 18068184847. The next prime is 18068184889. The reversal of 18068184871 is 17848186081.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18068184871 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18068184821) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 821281120 + ... + 821281141.

It is an arithmetic number, because the mean of its divisors is an integer number (4927686786).

Almost surely, 2^18068184871 is an apocalyptic number.

18068184871 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

18068184871 is a deficient number, since it is larger than the sum of its proper divisors (1642562273).

18068184871 is a wasteful number, since it uses less digits than its factorization.

18068184871 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1642562272.

The product of its (nonzero) digits is 688128, while the sum is 52.

The spelling of 18068184871 in words is "eighteen billion, sixty-eight million, one hundred eighty-four thousand, eight hundred seventy-one".