20300221 has 4 divisors (see below), whose sum is σ = 20335392. Its totient is φ = 20265052.

The previous prime is 20300201. The next prime is 20300233. The reversal of 20300221 is 12200302.

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.

It is a cyclic number.

It is not a de Polignac number, because 20300221 - 2⁹ = 20299709 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20300198 and 20300207.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20300201) 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, 16705 + ... + 17878.

It is an arithmetic number, because the mean of its divisors is an integer number (5083848).

Almost surely, 2^20300221 is an apocalyptic number.

It is an amenable number.

20300221 is a deficient number, since it is larger than the sum of its proper divisors (35171).

20300221 is an equidigital number, since it uses as much as digits as its factorization.

20300221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35170.

The product of its (nonzero) digits is 24, while the sum is 10.

The square root of 20300221 is about 4505.5766556569. The cubic root of 20300221 is about 272.7932303469.

Adding to 20300221 its reverse (12200302), we get a palindrome (32500523).

The spelling of 20300221 in words is "twenty million, three hundred thousand, two hundred twenty-one".