18014213 has 6 divisors (see below), whose sum is σ = 20955366. Its totient is φ = 15440712.

The previous prime is 18014209. The next prime is 18014219. The reversal of 18014213 is 31241081.

It can be written as a sum of positive squares in only one way, i.e., 17581249 + 432964 = 4193^2 + 658^2 .

It is not a de Polignac number, because 18014213 - 2² = 18014209 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 (18014219) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 183770 + ... + 183867.

It is an arithmetic number, because the mean of its divisors is an integer number (3492561).

Almost surely, 2^18014213 is an apocalyptic number.

It is an amenable number.

18014213 is a deficient number, since it is larger than the sum of its proper divisors (2941153).

18014213 is an equidigital number, since it uses as much as digits as its factorization.

18014213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 367651 (or 367644 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 20.

The square root of 18014213 is about 4244.3153747100. The cubic root of 18014213 is about 262.1431001575.

Adding to 18014213 its reverse (31241081), we get a palindrome (49255294).

The spelling of 18014213 in words is "eighteen million, fourteen thousand, two hundred thirteen".