18044473373 has 4 divisors (see below), whose sum is σ = 18045243840. Its totient is φ = 18043702908.

The previous prime is 18044473361. The next prime is 18044473417. The reversal of 18044473373 is 37337444081.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 18044473373 - 2⁴ = 18044473357 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 (18044473313) 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, 348965 + ... + 397322.

It is an arithmetic number, because the mean of its divisors is an integer number (4511310960).

Almost surely, 2^18044473373 is an apocalyptic number.

It is an amenable number.

18044473373 is a deficient number, since it is larger than the sum of its proper divisors (770467).

18044473373 is an equidigital number, since it uses as much as digits as its factorization.

18044473373 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 770466.

The product of its (nonzero) digits is 677376, while the sum is 44.

The spelling of 18044473373 in words is "eighteen billion, forty-four million, four hundred seventy-three thousand, three hundred seventy-three".