18867214 has 4 divisors (see below), whose sum is σ = 28300824. Its totient is φ = 9433606.

The previous prime is 18867181. The next prime is 18867223. The reversal of 18867214 is 41276881.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 41276881 = 23 ⋅1794647.

It is a congruent number.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 4716802 + ... + 4716805.

It is an arithmetic number, because the mean of its divisors is an integer number (7075206).

Almost surely, 2^18867214 is an apocalyptic number.

18867214 is a deficient number, since it is larger than the sum of its proper divisors (9433610).

18867214 is an equidigital number, since it uses as much as digits as its factorization.

18867214 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9433609.

The product of its digits is 21504, while the sum is 37.

The square root of 18867214 is about 4343.6406389111. The cubic root of 18867214 is about 266.2170858679.

The spelling of 18867214 in words is "eighteen million, eight hundred sixty-seven thousand, two hundred fourteen".