20203213 has 8 divisors (see below), whose sum is σ = 21431520. Its totient is φ = 18991440.

The previous prime is 20203187. The next prime is 20203217. The reversal of 20203213 is 31230202.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20203213 - 2¹⁷ = 20072141 is a prime.

It is a Duffinian number.

It is a plaindrome in base 16.

It is a junction number, because it is equal to n+sod(n) for n = 20203193 and 20203202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20203217) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1570 + ... + 6547.

It is an arithmetic number, because the mean of its divisors is an integer number (2678940).

Almost surely, 2^20203213 is an apocalyptic number.

It is an amenable number.

20203213 is a deficient number, since it is larger than the sum of its proper divisors (1228307).

20203213 is a wasteful number, since it uses less digits than its factorization.

20203213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8267.

The product of its (nonzero) digits is 72, while the sum is 13.

The square root of 20203213 is about 4494.7984381950. The cubic root of 20203213 is about 272.3580069934.

Adding to 20203213 its reverse (31230202), we get a palindrome (51433415).

The spelling of 20203213 in words is "twenty million, two hundred three thousand, two hundred thirteen".