18656703013 has 8 divisors (see below), whose sum is σ = 20180347488. Its totient is φ = 17145703344.

The previous prime is 18656703007. The next prime is 18656703019. The reversal of 18656703013 is 31030765681.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (18656703007) and next prime (18656703019).

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 18656703013 - 2¹³ = 18656694821 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18656703019) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3158131 + ... + 3164032.

It is an arithmetic number, because the mean of its divisors is an integer number (2522543436).

Almost surely, 2^18656703013 is an apocalyptic number.

18656703013 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

18656703013 is a deficient number, since it is larger than the sum of its proper divisors (1523644475).

18656703013 is a wasteful number, since it uses less digits than its factorization.

18656703013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6322403.

The product of its (nonzero) digits is 90720, while the sum is 40.

The spelling of 18656703013 in words is "eighteen billion, six hundred fifty-six million, seven hundred three thousand, thirteen".