18708713 has 4 divisors (see below), whose sum is σ = 18972288. Its totient is φ = 18445140.

The previous prime is 18708709. The next prime is 18708719. The reversal of 18708713 is 31780781.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 18708713 - 2² = 18708709 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (18708719) 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, 131681 + ... + 131822.

It is an arithmetic number, because the mean of its divisors is an integer number (4743072).

Almost surely, 2^18708713 is an apocalyptic number.

It is an amenable number.

18708713 is a deficient number, since it is larger than the sum of its proper divisors (263575).

18708713 is an equidigital number, since it uses as much as digits as its factorization.

18708713 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 263574.

The product of its (nonzero) digits is 9408, while the sum is 35.

The square root of 18708713 is about 4325.3569794874. The cubic root of 18708713 is about 265.4695035094.

The spelling of 18708713 in words is "eighteen million, seven hundred eight thousand, seven hundred thirteen".