18323811 has 12 divisors (see below), whose sum is σ = 28874040. Its totient is φ = 11105280.

The previous prime is 18323797. The next prime is 18323861. The reversal of 18323811 is 11832381.

It is not a de Polignac number, because 18323811 - 2⁹ = 18323299 is a prime.

It is not an unprimeable number, because it can be changed into a prime (18323861) 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 11 ways as a sum of consecutive naturals, for example, 92446 + ... + 92643.

It is an arithmetic number, because the mean of its divisors is an integer number (2406170).

Almost surely, 2^18323811 is an apocalyptic number.

18323811 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

18323811 is a deficient number, since it is larger than the sum of its proper divisors (10550229).

18323811 is a wasteful number, since it uses less digits than its factorization.

18323811 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 185106 (or 185103 counting only the distinct ones).

The product of its digits is 1152, while the sum is 27.

The square root of 18323811 is about 4280.6320794948. The cubic root of 18323811 is about 263.6363363997.

The spelling of 18323811 in words is "eighteen million, three hundred twenty-three thousand, eight hundred eleven".