18082811 has 2 divisors, whose sum is σ = 18082812. Its totient is φ = 18082810.

The previous prime is 18082769. The next prime is 18082819. The reversal of 18082811 is 11828081.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18082811 is a prime.

It is a super-3 number, since 3×18082811³ (a number of 23 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (18082819) 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 as a sum of consecutive naturals, namely, 9041405 + 9041406.

It is an arithmetic number, because the mean of its divisors is an integer number (9041406).

Almost surely, 2^18082811 is an apocalyptic number.

18082811 is a deficient number, since it is larger than the sum of its proper divisors (1).

18082811 is an equidigital number, since it uses as much as digits as its factorization.

18082811 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1024, while the sum is 29.

The square root of 18082811 is about 4252.3888580420. The cubic root of 18082811 is about 262.4754250615.

The spelling of 18082811 in words is "eighteen million, eighty-two thousand, eight hundred eleven".