20845843433 has 2 divisors, whose sum is σ = 20845843434. Its totient is φ = 20845843432.

The previous prime is 20845843429. The next prime is 20845843511. The reversal of 20845843433 is 33434854802.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 17749699984 + 3096143449 = 133228^2 + 55643^2 .

It is a cyclic number.

It is not a de Polignac number, because 20845843433 - 2² = 20845843429 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (20845846433) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10422921716 + 10422921717.

It is an arithmetic number, because the mean of its divisors is an integer number (10422921717).

Almost surely, 2^20845843433 is an apocalyptic number.

It is an amenable number.

20845843433 is a deficient number, since it is larger than the sum of its proper divisors (1).

20845843433 is an equidigital number, since it uses as much as digits as its factorization.

20845843433 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1105920, while the sum is 44.

The spelling of 20845843433 in words is "twenty billion, eight hundred forty-five million, eight hundred forty-three thousand, four hundred thirty-three".