20272212 has 18 divisors (see below), whose sum is σ = 51243738. Its totient is φ = 6757392.

The previous prime is 20272207. The next prime is 20272229. The reversal of 20272212 is 21227202.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 20196036 + 76176 = 4494^2 + 276^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

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 5 ways as a sum of consecutive naturals, for example, 281523 + ... + 281594.

Almost surely, 2^20272212 is an apocalyptic number.

It is an amenable number.

20272212 is an abundant number, since it is smaller than the sum of its proper divisors (30971526).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20272212 is a wasteful number, since it uses less digits than its factorization.

20272212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 563127 (or 563122 counting only the distinct ones).

The product of its (nonzero) digits is 224, while the sum is 18.

The square root of 20272212 is about 4502.4673235905. The cubic root of 20272212 is about 272.6677114781.

Adding to 20272212 its reverse (21227202), we get a palindrome (41499414).

The spelling of 20272212 in words is "twenty million, two hundred seventy-two thousand, two hundred twelve".