20427009833 has 2 divisors, whose sum is σ = 20427009834. Its totient is φ = 20427009832.

The previous prime is 20427009829. The next prime is 20427009853. The reversal of 20427009833 is 33890072402.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12332768809 + 8094241024 = 111053^2 + 89968^2 .

It is a cyclic number.

It is not a de Polignac number, because 20427009833 - 2² = 20427009829 is a prime.

It is not a weakly prime, because it can be changed into another prime (20427009853) 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, 10213504916 + 10213504917.

It is an arithmetic number, because the mean of its divisors is an integer number (10213504917).

Almost surely, 2^20427009833 is an apocalyptic number.

It is an amenable number.

20427009833 is a deficient number, since it is larger than the sum of its proper divisors (1).

20427009833 is an equidigital number, since it uses as much as digits as its factorization.

20427009833 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 72576, while the sum is 38.

The spelling of 20427009833 in words is "twenty billion, four hundred twenty-seven million, nine thousand, eight hundred thirty-three".