18706214 has 4 divisors (see below), whose sum is σ = 28059324. Its totient is φ = 9353106.

The previous prime is 18706213. The next prime is 18706231. The reversal of 18706214 is 41260781.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 41260781 = 23 ⋅1793947.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18706213) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4676552 + ... + 4676555.

It is an arithmetic number, because the mean of its divisors is an integer number (7014831).

Almost surely, 2^18706214 is an apocalyptic number.

18706214 is a deficient number, since it is larger than the sum of its proper divisors (9353110).

18706214 is an equidigital number, since it uses as much as digits as its factorization.

18706214 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9353109.

The product of its (nonzero) digits is 2688, while the sum is 29.

The square root of 18706214 is about 4325.0680919495. The cubic root of 18706214 is about 265.4576830307.

Adding to 18706214 its reverse (41260781), we get a palindrome (59966995).

The spelling of 18706214 in words is "eighteen million, seven hundred six thousand, two hundred fourteen".