70020841817 has 2 divisors, whose sum is σ = 70020841818. Its totient is φ = 70020841816.

The previous prime is 70020841789. The next prime is 70020841819. The reversal of 70020841817 is 71814802007.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 70018981321 + 1860496 = 264611^2 + 1364^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-70020841817 is a prime.

It is a super-2 number, since 2×70020841817² (a number of 22 digits) contains 22 as substring.

Together with 70020841819, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (70020841819) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35010420908 + 35010420909.

It is an arithmetic number, because the mean of its divisors is an integer number (35010420909).

Almost surely, 2^70020841817 is an apocalyptic number.

It is an amenable number.

70020841817 is a deficient number, since it is larger than the sum of its proper divisors (1).

70020841817 is an equidigital number, since it uses as much as digits as its factorization.

70020841817 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 25088, while the sum is 38.

The spelling of 70020841817 in words is "seventy billion, twenty million, eight hundred forty-one thousand, eight hundred seventeen".