20111244 has 12 divisors (see below), whose sum is σ = 46926264. Its totient is φ = 6703744.

The previous prime is 20111243. The next prime is 20111257. The reversal of 20111244 is 44211102.

It is a tau number, because it is divible by the number of its divisors (12).

It is not an unprimeable number, because it can be changed into a prime (20111243) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 837957 + ... + 837980.

It is an arithmetic number, because the mean of its divisors is an integer number (3910522).

Almost surely, 2^20111244 is an apocalyptic number.

It is an amenable number.

20111244 is an abundant number, since it is smaller than the sum of its proper divisors (26815020).

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

20111244 is a wasteful number, since it uses less digits than its factorization.

20111244 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1675944 (or 1675942 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 15.

The square root of 20111244 is about 4484.5561653301. The cubic root of 20111244 is about 271.9441025562.

Adding to 20111244 its reverse (44211102), we get a palindrome (64322346).

The spelling of 20111244 in words is "twenty million, one hundred eleven thousand, two hundred forty-four".