18268673 has 4 divisors (see below), whose sum is σ = 18291540. Its totient is φ = 18245808.

The previous prime is 18268667. The next prime is 18268687. The reversal of 18268673 is 37686281.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 37686281 = 5981 ⋅6301.

It can be written as a sum of positive squares in 2 ways, for example, as 5793649 + 12475024 = 2407^2 + 3532^2 .

It is a cyclic number.

It is not a de Polignac number, because 18268673 - 2⁶ = 18268609 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 18268673.

It is not an unprimeable number, because it can be changed into a prime (18268603) 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, 10190 + ... + 11847.

It is an arithmetic number, because the mean of its divisors is an integer number (4572885).

Almost surely, 2^18268673 is an apocalyptic number.

It is an amenable number.

18268673 is a deficient number, since it is larger than the sum of its proper divisors (22867).

18268673 is an equidigital number, since it uses as much as digits as its factorization.

18268673 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22866.

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

The square root of 18268673 is about 4274.1868232449. The cubic root of 18268673 is about 263.3716355474.

The spelling of 18268673 in words is "eighteen million, two hundred sixty-eight thousand, six hundred seventy-three".