20324550145447 has 2 divisors, whose sum is σ = 20324550145448. Its totient is φ = 20324550145446.

The previous prime is 20324550145421. The next prime is 20324550145481. The reversal of 20324550145447 is 74454105542302.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20324550145447 - 2¹⁵ = 20324550112679 is a prime.

It is a super-2 number, since 2×20324550145447² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 20324550145397 and 20324550145406.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20324550145747) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10162275072723 + 10162275072724.

It is an arithmetic number, because the mean of its divisors is an integer number (10162275072724).

Almost surely, 2^{20324550145447} is an apocalyptic number.

20324550145447 is a deficient number, since it is larger than the sum of its proper divisors (1).

20324550145447 is an equidigital number, since it uses as much as digits as its factorization.

20324550145447 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2688000, while the sum is 46.

Adding to 20324550145447 its reverse (74454105542302), we get a palindrome (94778655687749).

The spelling of 20324550145447 in words is "twenty trillion, three hundred twenty-four billion, five hundred fifty million, one hundred forty-five thousand, four hundred forty-seven".