18321101861071 has 4 divisors (see below), whose sum is σ = 18912105146944. Its totient is φ = 17730098575200.

The previous prime is 18321101861047. The next prime is 18321101861119. The reversal of 18321101861071 is 17016810112381.

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

It is a cyclic number.

It is not a de Polignac number, because 18321101861071 - 2¹⁵ = 18321101828303 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 (18321101861471) 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, 295501642890 + ... + 295501642951.

It is an arithmetic number, because the mean of its divisors is an integer number (4728026286736).

Almost surely, 2^{18321101861071} is an apocalyptic number.

18321101861071 is a deficient number, since it is larger than the sum of its proper divisors (591003285873).

18321101861071 is an equidigital number, since it uses as much as digits as its factorization.

18321101861071 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 591003285872.

The product of its (nonzero) digits is 16128, while the sum is 40.

The spelling of 18321101861071 in words is "eighteen trillion, three hundred twenty-one billion, one hundred one million, eight hundred sixty-one thousand, seventy-one".