18530713 has 2 divisors, whose sum is σ = 18530714. Its totient is φ = 18530712.

The previous prime is 18530711. The next prime is 18530741. The reversal of 18530713 is 31703581.

It is an a-pointer prime, because the next prime (18530741) can be obtained adding 18530713 to its sum of digits (28).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 18344089 + 186624 = 4283^2 + 432^2 .

It is a cyclic number.

It is not a de Polignac number, because 18530713 - 2¹ = 18530711 is a prime.

Together with 18530711, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (18530711) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9265356 + 9265357.

It is an arithmetic number, because the mean of its divisors is an integer number (9265357).

Almost surely, 2^18530713 is an apocalyptic number.

It is an amenable number.

18530713 is a deficient number, since it is larger than the sum of its proper divisors (1).

18530713 is an equidigital number, since it uses as much as digits as its factorization.

18530713 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2520, while the sum is 28.

The square root of 18530713 is about 4304.7314666539. The cubic root of 18530713 is about 264.6249018506.

The spelling of 18530713 in words is "eighteen million, five hundred thirty thousand, seven hundred thirteen".