18082813 has 12 divisors (see below), whose sum is σ = 22143360. Its totient is φ = 14683032.

The previous prime is 18082811. The next prime is 18082819. The reversal of 18082813 is 31828081.

It is not a de Polignac number, because 18082813 - 2¹ = 18082811 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18082811) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 8781 + ... + 10642.

It is an arithmetic number, because the mean of its divisors is an integer number (1845280).

Almost surely, 2^18082813 is an apocalyptic number.

It is an amenable number.

18082813 is a deficient number, since it is larger than the sum of its proper divisors (4060547).

18082813 is a wasteful number, since it uses less digits than its factorization.

18082813 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19456 (or 19449 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 31.

The square root of 18082813 is about 4252.3890932040. The cubic root of 18082813 is about 262.4754347382.

The spelling of 18082813 in words is "eighteen million, eighty-two thousand, eight hundred thirteen".