18536713 has 8 divisors (see below), whose sum is σ = 20651400. Its totient is φ = 16520448.

The previous prime is 18536701. The next prime is 18536717. The reversal of 18536713 is 31763581.

It can be written as a sum of positive squares in 4 ways, for example, as 1669264 + 16867449 = 1292^2 + 4107^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 18536713 - 2⁹ = 18536201 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18536717) 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 in 7 ways as a sum of consecutive naturals, for example, 24208 + ... + 24961.

It is an arithmetic number, because the mean of its divisors is an integer number (2581425).

Almost surely, 2^18536713 is an apocalyptic number.

18536713 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

18536713 is a deficient number, since it is larger than the sum of its proper divisors (2114687).

18536713 is a wasteful number, since it uses less digits than its factorization.

18536713 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49211.

The product of its digits is 15120, while the sum is 34.

The square root of 18536713 is about 4305.4283178332. The cubic root of 18536713 is about 264.6534594507.

The spelling of 18536713 in words is "eighteen million, five hundred thirty-six thousand, seven hundred thirteen".