18830513 has 16 divisors (see below), whose sum is σ = 20826960. Its totient is φ = 16920576.

The previous prime is 18830507. The next prime is 18830527. The reversal of 18830513 is 31503881.

It can be written as a sum of positive squares in 8 ways, for example, as 107584 + 18722929 = 328^2 + 4327^2 .

It is a cyclic number.

It is not a de Polignac number, because 18830513 - 2⁸ = 18830257 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18830533) 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 15 ways as a sum of consecutive naturals, for example, 137381 + ... + 137517.

It is an arithmetic number, because the mean of its divisors is an integer number (1301685).

Almost surely, 2^18830513 is an apocalyptic number.

18830513 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

18830513 is a deficient number, since it is larger than the sum of its proper divisors (1996447).

18830513 is a wasteful number, since it uses less digits than its factorization.

18830513 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 356.

The product of its (nonzero) digits is 2880, while the sum is 29.

The square root of 18830513 is about 4339.4139005170. The cubic root of 18830513 is about 266.0443563319.

The spelling of 18830513 in words is "eighteen million, eight hundred thirty thousand, five hundred thirteen".