20043224161 has 2 divisors, whose sum is σ = 20043224162. Its totient is φ = 20043224160.

The previous prime is 20043224137. The next prime is 20043224171. The reversal of 20043224161 is 16142234002.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 17944209936 + 2099014225 = 133956^2 + 45815^2 .

It is a cyclic number.

It is not a de Polignac number, because 20043224161 - 2²³ = 20034835553 is a prime.

It is a super-3 number, since 3×20043224161³ (a number of 32 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (20043224171) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10021612080 + 10021612081.

It is an arithmetic number, because the mean of its divisors is an integer number (10021612081).

Almost surely, 2^20043224161 is an apocalyptic number.

It is an amenable number.

20043224161 is a deficient number, since it is larger than the sum of its proper divisors (1).

20043224161 is an equidigital number, since it uses as much as digits as its factorization.

20043224161 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2304, while the sum is 25.

Adding to 20043224161 its reverse (16142234002), we get a palindrome (36185458163).

The spelling of 20043224161 in words is "twenty billion, forty-three million, two hundred twenty-four thousand, one hundred sixty-one".