20440212 has 36 divisors (see below), whose sum is σ = 51649920. Its totient is φ = 6288672.

The previous prime is 20440207. The next prime is 20440213. The reversal of 20440212 is 21204402.

It is a junction number, because it is equal to n+sod(n) for n = 20440191 and 20440200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20440213) 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 11 ways as a sum of consecutive naturals, for example, 3012 + ... + 7067.

It is an arithmetic number, because the mean of its divisors is an integer number (1434720).

Almost surely, 2^20440212 is an apocalyptic number.

It is an amenable number.

20440212 is an abundant number, since it is smaller than the sum of its proper divisors (31209708).

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

20440212 is a wasteful number, since it uses less digits than its factorization.

20440212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10112 (or 10097 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 15.

The square root of 20440212 is about 4521.0852679418. The cubic root of 20440212 is about 273.4188581599.

Adding to 20440212 its reverse (21204402), we get a palindrome (41644614).

The spelling of 20440212 in words is "twenty million, four hundred forty thousand, two hundred twelve".