20063221 has 4 divisors (see below), whose sum is σ = 21119200. Its totient is φ = 19007244.

The previous prime is 20063209. The next prime is 20063243. The reversal of 20063221 is 12236002.

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: 12236002 = 2 ⋅6118001.

It is a cyclic number.

It is not a de Polignac number, because 20063221 - 2¹⁵ = 20030453 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20063195 and 20063204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20063201) 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 3 ways as a sum of consecutive naturals, for example, 527961 + ... + 527998.

It is an arithmetic number, because the mean of its divisors is an integer number (5279800).

Almost surely, 2^20063221 is an apocalyptic number.

It is an amenable number.

20063221 is a deficient number, since it is larger than the sum of its proper divisors (1055979).

20063221 is a wasteful number, since it uses less digits than its factorization.

20063221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1055978.

The product of its (nonzero) digits is 144, while the sum is 16.

The square root of 20063221 is about 4479.1987006606. The cubic root of 20063221 is about 271.7274744800.

Adding to 20063221 its reverse (12236002), we get a palindrome (32299223).

The spelling of 20063221 in words is "twenty million, sixty-three thousand, two hundred twenty-one".