20641802353 has 2 divisors, whose sum is σ = 20641802354. Its totient is φ = 20641802352.

The previous prime is 20641802333. The next prime is 20641802371. The reversal of 20641802353 is 35320814602.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11859863409 + 8781938944 = 108903^2 + 93712^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20641802353 is a prime.

It is not a weakly prime, because it can be changed into another prime (20641802333) 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, 10320901176 + 10320901177.

It is an arithmetic number, because the mean of its divisors is an integer number (10320901177).

Almost surely, 2^20641802353 is an apocalyptic number.

It is an amenable number.

20641802353 is a deficient number, since it is larger than the sum of its proper divisors (1).

20641802353 is an equidigital number, since it uses as much as digits as its factorization.

20641802353 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 34560, while the sum is 34.

The spelling of 20641802353 in words is "twenty billion, six hundred forty-one million, eight hundred two thousand, three hundred fifty-three".