18143320123 has 4 divisors (see below), whose sum is σ = 18585840168. Its totient is φ = 17700800080.

The previous prime is 18143320109. The next prime is 18143320147. The reversal of 18143320123 is 32102334181.

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-18143320123 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 18143320091 and 18143320100.

It is not an unprimeable number, because it can be changed into a prime (18143323123) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 221259961 + ... + 221260042.

It is an arithmetic number, because the mean of its divisors is an integer number (4646460042).

Almost surely, 2^18143320123 is an apocalyptic number.

18143320123 is a deficient number, since it is larger than the sum of its proper divisors (442520045).

18143320123 is an equidigital number, since it uses as much as digits as its factorization.

18143320123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 442520044.

The product of its (nonzero) digits is 3456, while the sum is 28.

The spelling of 18143320123 in words is "eighteen billion, one hundred forty-three million, three hundred twenty thousand, one hundred twenty-three".