20570353 has 2 divisors, whose sum is σ = 20570354. Its totient is φ = 20570352.

The previous prime is 20570351. The next prime is 20570377. The reversal of 20570353 is 35307502.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 20539024 + 31329 = 4532^2 + 177^2 .

It is a cyclic number.

It is not a de Polignac number, because 20570353 - 2¹ = 20570351 is a prime.

Together with 20570351, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (20570351) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10285176 + 10285177.

It is an arithmetic number, because the mean of its divisors is an integer number (10285177).

Almost surely, 2^20570353 is an apocalyptic number.

It is an amenable number.

20570353 is a deficient number, since it is larger than the sum of its proper divisors (1).

20570353 is an equidigital number, since it uses as much as digits as its factorization.

20570353 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3150, while the sum is 25.

The square root of 20570353 is about 4535.4551039559. The cubic root of 20570353 is about 273.9979087698.

Adding to 20570353 its reverse (35307502), we get a palindrome (55877855).

The spelling of 20570353 in words is "twenty million, five hundred seventy thousand, three hundred fifty-three".