18106823 has 12 divisors (see below), whose sum is σ = 21135600. Its totient is φ = 15466752.

The previous prime is 18106787. The next prime is 18106831. The reversal of 18106823 is 32860181.

It is not a de Polignac number, because 18106823 - 2⁸ = 18106567 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 (18106843) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 21590 + ... + 22412.

It is an arithmetic number, because the mean of its divisors is an integer number (1761300).

Almost surely, 2^18106823 is an apocalyptic number.

18106823 is a deficient number, since it is larger than the sum of its proper divisors (3028777).

18106823 is an equidigital number, since it uses as much as digits as its factorization.

18106823 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1286 (or 1279 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 29.

The square root of 18106823 is about 4255.2112756008. The cubic root of 18106823 is about 262.5915532501.

The spelling of 18106823 in words is "eighteen million, one hundred six thousand, eight hundred twenty-three".