20211244 has 12 divisors (see below), whose sum is σ = 35575344. Its totient is φ = 10046864.

The previous prime is 20211241. The next prime is 20211253. The reversal of 20211244 is 44211202.

It is not an unprimeable number, because it can be changed into a prime (20211241) 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 3 ways as a sum of consecutive naturals, for example, 13912 + ... + 15295.

It is an arithmetic number, because the mean of its divisors is an integer number (2964612).

Almost surely, 2^20211244 is an apocalyptic number.

It is an amenable number.

20211244 is a deficient number, since it is larger than the sum of its proper divisors (15364100).

20211244 is a wasteful number, since it uses less digits than its factorization.

20211244 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29384 (or 29382 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 16.

The square root of 20211244 is about 4495.6917154093. The cubic root of 20211244 is about 272.3940906499.

Adding to 20211244 its reverse (44211202), we get a palindrome (64422446).

The spelling of 20211244 in words is "twenty million, two hundred eleven thousand, two hundred forty-four".