18685073443 has 6 divisors (see below), whose sum is σ = 18924593604. Its totient is φ = 18448547364.

The previous prime is 18685073437. The next prime is 18685073453. The reversal of 18685073443 is 34437058681.

It is not a de Polignac number, because 18685073443 - 2¹³ = 18685065251 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18685073453) 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 5 ways as a sum of consecutive naturals, for example, 1490721 + ... + 1503202.

It is an arithmetic number, because the mean of its divisors is an integer number (3154098934).

Almost surely, 2^18685073443 is an apocalyptic number.

18685073443 is a deficient number, since it is larger than the sum of its proper divisors (239520161).

18685073443 is an frugal number, since it uses more digits than its factorization.

18685073443 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2994081 (or 2994002 counting only the distinct ones).

The product of its (nonzero) digits is 1935360, while the sum is 49.

The spelling of 18685073443 in words is "eighteen billion, six hundred eighty-five million, seventy-three thousand, four hundred forty-three".