20444143313231 has 8 divisors (see below), whose sum is σ = 22302881000400. Its totient is φ = 18585435493440.

The previous prime is 20444143313213. The next prime is 20444143313239. The reversal of 20444143313231 is 13231334144402.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20444143313231 is a prime.

It is a super-2 number, since 2×20444143313231² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 20444143313191 and 20444143313200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20444143313239) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6023486 + ... + 8784683.

It is an arithmetic number, because the mean of its divisors is an integer number (2787860125050).

Almost surely, 2^{20444143313231} is an apocalyptic number.

20444143313231 is a deficient number, since it is larger than the sum of its proper divisors (1858737687169).

20444143313231 is a wasteful number, since it uses less digits than its factorization.

20444143313231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14933689.

The product of its (nonzero) digits is 82944, while the sum is 35.

Adding to 20444143313231 its reverse (13231334144402), we get a palindrome (33675477457633).

The spelling of 20444143313231 in words is "twenty trillion, four hundred forty-four billion, one hundred forty-three million, three hundred thirteen thousand, two hundred thirty-one".