18384713 has 4 divisors (see below), whose sum is σ = 18486468. Its totient is φ = 18282960.

The previous prime is 18384697. The next prime is 18384719. The reversal of 18384713 is 31748381.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 31748381 = 7 ⋅4535483.

It can be written as a sum of positive squares in 2 ways, for example, as 3853369 + 14531344 = 1963^2 + 3812^2 .

It is a cyclic number.

It is not a de Polignac number, because 18384713 - 2⁴ = 18384697 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18384719) 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, 50606 + ... + 50967.

It is an arithmetic number, because the mean of its divisors is an integer number (4621617).

Almost surely, 2^18384713 is an apocalyptic number.

It is an amenable number.

18384713 is a deficient number, since it is larger than the sum of its proper divisors (101755).

18384713 is a wasteful number, since it uses less digits than its factorization.

18384713 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 101754.

The product of its digits is 16128, while the sum is 35.

The square root of 18384713 is about 4287.7398475187. The cubic root of 18384713 is about 263.9280920241.

The spelling of 18384713 in words is "eighteen million, three hundred eighty-four thousand, seven hundred thirteen".