20131231012044 has 36 divisors (see below), whose sum is σ = 49898518399464. Its totient is φ = 6315680316416.

The previous prime is 20131231012033. The next prime is 20131231012111. The reversal of 20131231012044 is 44021013213102.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2902423149 + ... + 2902430084.

Almost surely, 2^{20131231012044} is an apocalyptic number.

It is an amenable number.

20131231012044 is an abundant number, since it is smaller than the sum of its proper divisors (29767287387420).

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

20131231012044 is a wasteful number, since it uses less digits than its factorization.

20131231012044 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5804853274 (or 5804853255 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 24.

Adding to 20131231012044 its reverse (44021013213102), we get a palindrome (64152244225146).

The spelling of 20131231012044 in words is "twenty trillion, one hundred thirty-one billion, two hundred thirty-one million, twelve thousand, forty-four".