18722322143 has 12 divisors (see below), whose sum is σ = 21807690192. Its totient is φ = 16026585120.

The previous prime is 18722322137. The next prime is 18722322169. The reversal of 18722322143 is 34122322781.

It is not a de Polignac number, because 18722322143 - 2⁴ = 18722322127 is a prime.

It is a super-2 number, since 2×18722322143² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18722322103) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 213755 + ... + 288332.

It is an arithmetic number, because the mean of its divisors is an integer number (1817307516).

Almost surely, 2^18722322143 is an apocalyptic number.

18722322143 is a deficient number, since it is larger than the sum of its proper divisors (3085368049).

18722322143 is an equidigital number, since it uses as much as digits as its factorization.

18722322143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 502862 (or 502855 counting only the distinct ones).

The product of its digits is 32256, while the sum is 35.

The spelling of 18722322143 in words is "eighteen billion, seven hundred twenty-two million, three hundred twenty-two thousand, one hundred forty-three".