20570225891 has 2 divisors, whose sum is σ = 20570225892. Its totient is φ = 20570225890.

The previous prime is 20570225849. The next prime is 20570225933. The reversal of 20570225891 is 19852207502.

It is a balanced prime because it is at equal distance from previous prime (20570225849) and next prime (20570225933).

It is a cyclic number.

It is not a de Polignac number, because 20570225891 - 2⁶ = 20570225827 is a prime.

It is not a weakly prime, because it can be changed into another prime (20570225791) 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, 10285112945 + 10285112946.

It is an arithmetic number, because the mean of its divisors is an integer number (10285112946).

Almost surely, 2^20570225891 is an apocalyptic number.

20570225891 is a deficient number, since it is larger than the sum of its proper divisors (1).

20570225891 is an equidigital number, since it uses as much as digits as its factorization.

20570225891 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 100800, while the sum is 41.

The spelling of 20570225891 in words is "twenty billion, five hundred seventy million, two hundred twenty-five thousand, eight hundred ninety-one".