20131224313244 has 12 divisors (see below), whose sum is σ = 38432337325368. Its totient is φ = 9150556506000.

The previous prime is 20131224313243. The next prime is 20131224313267. The reversal of 20131224313244 is 44231342213102.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 20131224313244.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20131224313241) 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, 228763912607 + ... + 228763912694.

It is an arithmetic number, because the mean of its divisors is an integer number (3202694777114).

Almost surely, 2^{20131224313244} is an apocalyptic number.

It is an amenable number.

20131224313244 is a deficient number, since it is larger than the sum of its proper divisors (18301113012124).

20131224313244 is a wasteful number, since it uses less digits than its factorization.

20131224313244 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 457527825316 (or 457527825314 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 32.

Adding to 20131224313244 its reverse (44231342213102), we get a palindrome (64362566526346).

The spelling of 20131224313244 in words is "twenty trillion, one hundred thirty-one billion, two hundred twenty-four million, three hundred thirteen thousand, two hundred forty-four".