20344633055231 has 2 divisors, whose sum is σ = 20344633055232. Its totient is φ = 20344633055230.

The previous prime is 20344633055191. The next prime is 20344633055261. The reversal of 20344633055231 is 13255033644302.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20344633055231 is a prime.

It is a super-2 number, since 2×20344633055231² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20344633055261) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10172316527615 + 10172316527616.

It is an arithmetic number, because the mean of its divisors is an integer number (10172316527616).

Almost surely, 2^{20344633055231} is an apocalyptic number.

20344633055231 is a deficient number, since it is larger than the sum of its proper divisors (1).

20344633055231 is an equidigital number, since it uses as much as digits as its factorization.

20344633055231 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 777600, while the sum is 41.

Adding to 20344633055231 its reverse (13255033644302), we get a palindrome (33599666699533).

The spelling of 20344633055231 in words is "twenty trillion, three hundred forty-four billion, six hundred thirty-three million, fifty-five thousand, two hundred thirty-one".