1812023 has 4 divisors (see below), whose sum is σ = 1835040. Its totient is φ = 1789008.

The previous prime is 1811993. The next prime is 1812037. The reversal of 1812023 is 3202181.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1812023 - 2⁶ = 1811959 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1811992 and 1812010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1812053) 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 3 ways as a sum of consecutive naturals, for example, 11390 + ... + 11547.

It is an arithmetic number, because the mean of its divisors is an integer number (458760).

2^1812023 is an apocalyptic number.

1812023 is a deficient number, since it is larger than the sum of its proper divisors (23017).

1812023 is an equidigital number, since it uses as much as digits as its factorization.

1812023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23016.

The product of its (nonzero) digits is 96, while the sum is 17.

The square root of 1812023 is about 1346.1140367740. The cubic root of 1812023 is about 121.9142773252.

The spelling of 1812023 in words is "one million, eight hundred twelve thousand, twenty-three".