20121244 has 48 divisors (see below), whose sum is σ = 42829920. Its totient is φ = 8144640.

The previous prime is 20121193. The next prime is 20121271. The reversal of 20121244 is 44212102.

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 15 ways as a sum of consecutive naturals, for example, 15982 + ... + 17194.

It is an arithmetic number, because the mean of its divisors is an integer number (892290).

Almost surely, 2^20121244 is an apocalyptic number.

It is an amenable number.

20121244 is an abundant number, since it is smaller than the sum of its proper divisors (22708676).

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

20121244 is a wasteful number, since it uses less digits than its factorization.

20121244 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1270 (or 1268 counting only the distinct ones).

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

The square root of 20121244 is about 4485.6709643040. The cubic root of 20121244 is about 271.9891683980.

Adding to 20121244 its reverse (44212102), we get a palindrome (64333346).

The spelling of 20121244 in words is "twenty million, one hundred twenty-one thousand, two hundred forty-four".