20083221 has 18 divisors (see below), whose sum is σ = 30133142. Its totient is φ = 13384440.

The previous prime is 20083211. The next prime is 20083223. The reversal of 20083221 is 12238002.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 19847025 + 236196 = 4455^2 + 486^2 .

It is not a de Polignac number, because 20083221 - 2⁷ = 20083093 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20083194 and 20083203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20083223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 5031 + ... + 8091.

Almost surely, 2^20083221 is an apocalyptic number.

It is an amenable number.

20083221 is a deficient number, since it is larger than the sum of its proper divisors (10049921).

20083221 is an frugal number, since it uses more digits than its factorization.

20083221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3085 (or 3064 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

The square root of 20083221 is about 4481.4306867339. The cubic root of 20083221 is about 271.8177349070.

The spelling of 20083221 in words is "twenty million, eighty-three thousand, two hundred twenty-one".