18442043473 has 24 divisors (see below), whose sum is σ = 22381268928. Its totient is φ = 14883287328.

The previous prime is 18442043467. The next prime is 18442043537. The reversal of 18442043473 is 37434024481.

It is not a de Polignac number, because 18442043473 - 2⁹ = 18442042961 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18442043453) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 389515 + ... + 434287.

It is an arithmetic number, because the mean of its divisors is an integer number (932552872).

Almost surely, 2^18442043473 is an apocalyptic number.

It is an amenable number.

18442043473 is a deficient number, since it is larger than the sum of its proper divisors (3939225455).

18442043473 is a wasteful number, since it uses less digits than its factorization.

18442043473 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44981 (or 44962 counting only the distinct ones).

The product of its (nonzero) digits is 258048, while the sum is 40.

The spelling of 18442043473 in words is "eighteen billion, four hundred forty-two million, forty-three thousand, four hundred seventy-three".