20020343040809 has 2 divisors, whose sum is σ = 20020343040810. Its totient is φ = 20020343040808.

The previous prime is 20020343040739. The next prime is 20020343040829. The reversal of 20020343040809 is 90804034302002.

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., 16789121087209 + 3231221953600 = 4097453^2 + 1797560^2 .

It is a cyclic number.

It is not a de Polignac number, because 20020343040809 - 2³² = 20016048073513 is a prime.

It is not a weakly prime, because it can be changed into another prime (20020343040829) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10010171520404 + 10010171520405.

It is an arithmetic number, because the mean of its divisors is an integer number (10010171520405).

Almost surely, 2^{20020343040809} is an apocalyptic number.

It is an amenable number.

20020343040809 is a deficient number, since it is larger than the sum of its proper divisors (1).

20020343040809 is an equidigital number, since it uses as much as digits as its factorization.

20020343040809 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 41472, while the sum is 35.

The spelling of 20020343040809 in words is "twenty trillion, twenty billion, three hundred forty-three million, forty thousand, eight hundred nine".