20303440443231 has 16 divisors (see below), whose sum is σ = 29533609015680. Its totient is φ = 12304560417120.

The previous prime is 20303440443211. The next prime is 20303440443263. The reversal of 20303440443231 is 13234404430302.

It is a happy number.

It is not a de Polignac number, because 20303440443231 - 2¹¹ = 20303440441183 is a prime.

It is a super-2 number, since 2×20303440443231² (a number of 27 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a junction number, because it is equal to n+sod(n) for n = 20303440443192 and 20303440443201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20303440443211) 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, 13131745 + ... + 14596218.

It is an arithmetic number, because the mean of its divisors is an integer number (1845850563480).

Almost surely, 2^{20303440443231} is an apocalyptic number.

20303440443231 is a deficient number, since it is larger than the sum of its proper divisors (9230168572449).

20303440443231 is a wasteful number, since it uses less digits than its factorization.

20303440443231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27750166.

The product of its (nonzero) digits is 82944, while the sum is 33.

Adding to 20303440443231 its reverse (13234404430302), we get a palindrome (33537844873533).

The spelling of 20303440443231 in words is "twenty trillion, three hundred three billion, four hundred forty million, four hundred forty-three thousand, two hundred thirty-one".