20043241397 has 2 divisors, whose sum is σ = 20043241398. Its totient is φ = 20043241396.

The previous prime is 20043241243. The next prime is 20043241403. The reversal of 20043241397 is 79314234002.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 17702036401 + 2341204996 = 133049^2 + 48386^2 .

It is a cyclic number.

It is not a de Polignac number, because 20043241397 - 2¹² = 20043237301 is a prime.

It is a super-3 number, since 3×20043241397³ (a number of 32 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20043241597) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10021620698 + 10021620699.

It is an arithmetic number, because the mean of its divisors is an integer number (10021620699).

Almost surely, 2^20043241397 is an apocalyptic number.

It is an amenable number.

20043241397 is a deficient number, since it is larger than the sum of its proper divisors (1).

20043241397 is an equidigital number, since it uses as much as digits as its factorization.

20043241397 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 36288, while the sum is 35.

Adding to 20043241397 its reverse (79314234002), we get a palindrome (99357475399).

The spelling of 20043241397 in words is "twenty billion, forty-three million, two hundred forty-one thousand, three hundred ninety-seven".