20144213 has 4 divisors (see below), whose sum is σ = 20474508. Its totient is φ = 19813920.

The previous prime is 20144209. The next prime is 20144219. The reversal of 20144213 is 31244102.

20144213 = T₇₈₂ + T₇₈₃ + ... + T₈₄₂.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 31244102 = 2 ⋅15622051.

It can be written as a sum of positive squares in 2 ways, for example, as 5870929 + 14273284 = 2423^2 + 3778^2 .

It is a cyclic number.

It is not a de Polignac number, because 20144213 - 2² = 20144209 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20144191 and 20144200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20144219) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 165056 + ... + 165177.

It is an arithmetic number, because the mean of its divisors is an integer number (5118627).

Almost surely, 2^20144213 is an apocalyptic number.

It is an amenable number.

20144213 is a deficient number, since it is larger than the sum of its proper divisors (330295).

20144213 is an equidigital number, since it uses as much as digits as its factorization.

20144213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 330294.

The product of its (nonzero) digits is 192, while the sum is 17.

The square root of 20144213 is about 4488.2304976460. The cubic root of 20144213 is about 272.0926236242.

Adding to 20144213 its reverse (31244102), we get a palindrome (51388315).

The spelling of 20144213 in words is "twenty million, one hundred forty-four thousand, two hundred thirteen".