20240213 has 4 divisors (see below), whose sum is σ = 23131680. Its totient is φ = 17348748.

The previous prime is 20240197. The next prime is 20240219. The reversal of 20240213 is 31204202.

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, and also an emirpimes, since its reverse is a distinct semiprime: 31204202 = 2 ⋅15602101.

It is a cyclic number.

It is not a de Polignac number, because 20240213 - 2⁴ = 20240197 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 (20240219) 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, 1445723 + ... + 1445736.

It is an arithmetic number, because the mean of its divisors is an integer number (5782920).

Almost surely, 2^20240213 is an apocalyptic number.

It is an amenable number.

20240213 is a deficient number, since it is larger than the sum of its proper divisors (2891467).

20240213 is an equidigital number, since it uses as much as digits as its factorization.

20240213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2891466.

The product of its (nonzero) digits is 96, while the sum is 14.

The square root of 20240213 is about 4498.9124241310. The cubic root of 20240213 is about 272.5241703443.

Adding to 20240213 its reverse (31204202), we get a palindrome (51444415).

The spelling of 20240213 in words is "twenty million, two hundred forty thousand, two hundred thirteen".