1818673223 has 4 divisors (see below), whose sum is σ = 1825434360. Its totient is φ = 1811912088.

The previous prime is 1818673193. The next prime is 1818673229. The reversal of 1818673223 is 3223768181.

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 1818673223 - 2³⁰ = 744931399 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 (1818673229) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3380165 + ... + 3380702.

It is an arithmetic number, because the mean of its divisors is an integer number (456358590).

Almost surely, 2^1818673223 is an apocalyptic number.

1818673223 is a deficient number, since it is larger than the sum of its proper divisors (6761137).

1818673223 is an equidigital number, since it uses as much as digits as its factorization.

1818673223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6761136.

The product of its digits is 96768, while the sum is 41.

The square root of 1818673223 is about 42645.9051140904. The cubic root of 1818673223 is about 1220.6323925107.

The spelling of 1818673223 in words is "one billion, eight hundred eighteen million, six hundred seventy-three thousand, two hundred twenty-three".