18493313 has 8 divisors (see below), whose sum is σ = 18834816. Its totient is φ = 18154800.

The previous prime is 18493291. The next prime is 18493333. The reversal of 18493313 is 31339481.

It is a happy number.

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 18493313 - 2¹⁰ = 18492289 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 18493313.

It is not an unprimeable number, because it can be changed into a prime (18493333) 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, 14408 + ... + 15638.

It is an arithmetic number, because the mean of its divisors is an integer number (2354352).

Almost surely, 2^18493313 is an apocalyptic number.

It is an amenable number.

18493313 is a deficient number, since it is larger than the sum of its proper divisors (341503).

18493313 is a wasteful number, since it uses less digits than its factorization.

18493313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1495.

The product of its digits is 7776, while the sum is 32.

The square root of 18493313 is about 4300.3852153034. The cubic root of 18493313 is about 264.4467536944.

The spelling of 18493313 in words is "eighteen million, four hundred ninety-three thousand, three hundred thirteen".