18968273 has 4 divisors (see below), whose sum is σ = 18977280. Its totient is φ = 18959268.

The previous prime is 18968231. The next prime is 18968317. The reversal of 18968273 is 37286981.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 18968273 - 2²⁰ = 17919697 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18938273) 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, 536 + ... + 6182.

It is an arithmetic number, because the mean of its divisors is an integer number (4744320).

Almost surely, 2^18968273 is an apocalyptic number.

It is an amenable number.

18968273 is a deficient number, since it is larger than the sum of its proper divisors (9007).

18968273 is an equidigital number, since it uses as much as digits as its factorization.

18968273 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9006.

The product of its digits is 145152, while the sum is 44.

The square root of 18968273 is about 4355.2580864973. The cubic root of 18968273 is about 266.6915551423.

The spelling of 18968273 in words is "eighteen million, nine hundred sixty-eight thousand, two hundred seventy-three".