20303213 has 8 divisors (see below), whose sum is σ = 23267328. Its totient is φ = 17355024.

The previous prime is 20303203. The next prime is 20303249. The reversal of 20303213 is 31230302.

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 20303213 - 2⁴ = 20303197 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20303203) 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, 1106 + ... + 6467.

It is an arithmetic number, because the mean of its divisors is an integer number (2908416).

Almost surely, 2^20303213 is an apocalyptic number.

It is an amenable number.

20303213 is a deficient number, since it is larger than the sum of its proper divisors (2964115).

20303213 is an equidigital number, since it uses as much as digits as its factorization.

20303213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7963.

The product of its (nonzero) digits is 108, while the sum is 14.

The square root of 20303213 is about 4505.9086763937. The cubic root of 20303213 is about 272.8066317979.

Adding to 20303213 its reverse (31230302), we get a palindrome (51533515).

The spelling of 20303213 in words is "twenty million, three hundred three thousand, two hundred thirteen".