20522212 has 6 divisors (see below), whose sum is σ = 35913878. Its totient is φ = 10261104.

The previous prime is 20522209. The next prime is 20522219. The reversal of 20522212 is 21222502.

It can be written as a sum of positive squares in only one way, i.e., 20286016 + 236196 = 4504^2 + 486^2 .

It is a super-2 number, since 2×20522212² = 842322370745888, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (20522219) 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 as a sum of consecutive naturals, namely, 2565273 + ... + 2565280.

Almost surely, 2^20522212 is an apocalyptic number.

It is an amenable number.

20522212 is a deficient number, since it is larger than the sum of its proper divisors (15391666).

20522212 is a wasteful number, since it uses less digits than its factorization.

20522212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5130557 (or 5130555 counting only the distinct ones).

The product of its (nonzero) digits is 160, while the sum is 16.

The square root of 20522212 is about 4530.1448100475. The cubic root of 20522212 is about 273.7839951388.

Adding to 20522212 its reverse (21222502), we get a palindrome (41744714).

The spelling of 20522212 in words is "twenty million, five hundred twenty-two thousand, two hundred twelve".