20131401231444 has 48 divisors (see below), whose sum is σ = 48497213915136. Its totient is φ = 6492838216800.

The previous prime is 20131401231443. The next prime is 20131401231451. The reversal of 20131401231444 is 44413210413102.

It is a happy number.

It is a super-4 number, since 4×20131401231444⁴ (a number of 54 digits) contains 4444 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20131401231443) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2759772 + ... + 6919475.

It is an arithmetic number, because the mean of its divisors is an integer number (1010358623232).

Almost surely, 2^{20131401231444} is an apocalyptic number.

It is an amenable number.

20131401231444 is an abundant number, since it is smaller than the sum of its proper divisors (28365812683692).

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

20131401231444 is a wasteful number, since it uses less digits than its factorization.

20131401231444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9684876 (or 9684874 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 30.

Adding to 20131401231444 its reverse (44413210413102), we get a palindrome (64544611644546).

The spelling of 20131401231444 in words is "twenty trillion, one hundred thirty-one billion, four hundred one million, two hundred thirty-one thousand, four hundred forty-four".