20302221 has 8 divisors (see below), whose sum is σ = 27091584. Its totient is φ = 13523840.

The previous prime is 20302211. The next prime is 20302223. The reversal of 20302221 is 12220302.

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 20302221 - 2⁵ = 20302189 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20302197 and 20302206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20302223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3805 + ... + 7421.

It is an arithmetic number, because the mean of its divisors is an integer number (3386448).

Almost surely, 2^20302221 is an apocalyptic number.

It is an amenable number.

20302221 is a deficient number, since it is larger than the sum of its proper divisors (6789363).

20302221 is a wasteful number, since it uses less digits than its factorization.

20302221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5491.

The product of its (nonzero) digits is 48, while the sum is 12.

The square root of 20302221 is about 4505.7985973632. The cubic root of 20302221 is about 272.8021886819.

Adding to 20302221 its reverse (12220302), we get a palindrome (32522523).

The spelling of 20302221 in words is "twenty million, three hundred two thousand, two hundred twenty-one".