20324550145481 has 2 divisors, whose sum is σ = 20324550145482. Its totient is φ = 20324550145480.

The previous prime is 20324550145447. The next prime is 20324550145577. The reversal of 20324550145481 is 18454105542302.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 13339185721225 + 6985364424256 = 3652285^2 + 2642984^2 .

It is a cyclic number.

It is not a de Polignac number, because 20324550145481 - 2¹⁴ = 20324550129097 is a prime.

It is a super-2 number, since 2×20324550145481² (a number of 27 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (20324550145421) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10162275072740 + 10162275072741.

It is an arithmetic number, because the mean of its divisors is an integer number (10162275072741).

Almost surely, 2^{20324550145481} is an apocalyptic number.

It is an amenable number.

20324550145481 is a deficient number, since it is larger than the sum of its proper divisors (1).

20324550145481 is an equidigital number, since it uses as much as digits as its factorization.

20324550145481 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 768000, while the sum is 44.

Adding to 20324550145481 its reverse (18454105542302), we get a palindrome (38778655687783).

The spelling of 20324550145481 in words is "twenty trillion, three hundred twenty-four billion, five hundred fifty million, one hundred forty-five thousand, four hundred eighty-one".