18144213 has 4 divisors (see below), whose sum is σ = 24192288. Its totient is φ = 12096140.

The previous prime is 18144199. The next prime is 18144229. The reversal of 18144213 is 31244181.

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.

It is a cyclic number.

It is not a de Polignac number, because 18144213 - 2⁴ = 18144197 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18144233) 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, 3024033 + ... + 3024038.

It is an arithmetic number, because the mean of its divisors is an integer number (6048072).

Almost surely, 2^18144213 is an apocalyptic number.

It is an amenable number.

18144213 is a deficient number, since it is larger than the sum of its proper divisors (6048075).

18144213 is an equidigital number, since it uses as much as digits as its factorization.

18144213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6048074.

The product of its digits is 768, while the sum is 24.

The square root of 18144213 is about 4259.6024462384. The cubic root of 18144213 is about 262.7721766494.

Adding to 18144213 its reverse (31244181), we get a palindrome (49388394).

The spelling of 18144213 in words is "eighteen million, one hundred forty-four thousand, two hundred thirteen".