18308713 has 8 divisors (see below), whose sum is σ = 19152000. Its totient is φ = 17469408.

The previous prime is 18308707. The next prime is 18308737. The reversal of 18308713 is 31780381.

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 18308713 - 2¹³ = 18300521 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18308743) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12388 + ... + 13786.

It is an arithmetic number, because the mean of its divisors is an integer number (2394000).

Almost surely, 2^18308713 is an apocalyptic number.

It is an amenable number.

18308713 is a deficient number, since it is larger than the sum of its proper divisors (843287).

18308713 is a wasteful number, since it uses less digits than its factorization.

18308713 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1991.

The product of its (nonzero) digits is 4032, while the sum is 31.

The square root of 18308713 is about 4278.8681914731. The cubic root of 18308713 is about 263.5639083237.

The spelling of 18308713 in words is "eighteen million, three hundred eight thousand, seven hundred thirteen".