18033647113 has 4 divisors (see below), whose sum is σ = 18033985300. Its totient is φ = 18033308928.

The previous prime is 18033647089. The next prime is 18033647117. The reversal of 18033647113 is 31174633081.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 3197676304 + 14835970809 = 56548^2 + 121803^2 .

It is a cyclic number.

It is not a de Polignac number, because 18033647113 - 2¹³ = 18033638921 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18033647117) 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, 69588 + ... + 202261.

It is an arithmetic number, because the mean of its divisors is an integer number (4508496325).

Almost surely, 2^18033647113 is an apocalyptic number.

It is an amenable number.

18033647113 is a deficient number, since it is larger than the sum of its proper divisors (338187).

18033647113 is an equidigital number, since it uses as much as digits as its factorization.

18033647113 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 338186.

The product of its (nonzero) digits is 36288, while the sum is 37.

The spelling of 18033647113 in words is "eighteen billion, thirty-three million, six hundred forty-seven thousand, one hundred thirteen".