18485043713 has 4 divisors (see below), whose sum is σ = 18654631380. Its totient is φ = 18315456048.

The previous prime is 18485043697. The next prime is 18485043727. The reversal of 18485043713 is 31734058481.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 31734058481 = 139 ⋅228302579.

It can be written as a sum of positive squares in 2 ways, for example, as 7952537329 + 10532506384 = 89177^2 + 102628^2 .

It is a cyclic number.

It is not a de Polignac number, because 18485043713 - 2⁴ = 18485043697 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18485043743) 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, 84793670 + ... + 84793887.

It is an arithmetic number, because the mean of its divisors is an integer number (4663657845).

Almost surely, 2^18485043713 is an apocalyptic number.

It is an amenable number.

18485043713 is a deficient number, since it is larger than the sum of its proper divisors (169587667).

18485043713 is a wasteful number, since it uses less digits than its factorization.

18485043713 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 169587666.

The product of its (nonzero) digits is 322560, while the sum is 44.

The spelling of 18485043713 in words is "eighteen billion, four hundred eighty-five million, forty-three thousand, seven hundred thirteen".