20344633055081 has 2 divisors, whose sum is σ = 20344633055082. Its totient is φ = 20344633055080.

The previous prime is 20344633055069. The next prime is 20344633055191. The reversal of 20344633055081 is 18055033644302.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 19842035713600 + 502597341481 = 4454440^2 + 708941^2 .

It is a cyclic number.

It is not a de Polignac number, because 20344633055081 - 2¹⁸ = 20344632792937 is a prime.

It is a super-2 number, since 2×20344633055081² (a number of 27 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (20344633055051) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10172316527540 + 10172316527541.

It is an arithmetic number, because the mean of its divisors is an integer number (10172316527541).

Almost surely, 2^{20344633055081} is an apocalyptic number.

It is an amenable number.

20344633055081 is a deficient number, since it is larger than the sum of its proper divisors (1).

20344633055081 is an equidigital number, since it uses as much as digits as its factorization.

20344633055081 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1036800, while the sum is 44.

Adding to 20344633055081 its reverse (18055033644302), we get a palindrome (38399666699383).

The spelling of 20344633055081 in words is "twenty trillion, three hundred forty-four billion, six hundred thirty-three million, fifty-five thousand, eighty-one".