8021793310831 has 2 divisors, whose sum is σ = 8021793310832. Its totient is φ = 8021793310830.

The previous prime is 8021793310819. The next prime is 8021793310837. The reversal of 8021793310831 is 1380133971208.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 8021793310831 - 2²¹ = 8021791213679 is a prime.

It is a super-2 number, since 2×8021793310831² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8021793310837) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4010896655415 + 4010896655416.

It is an arithmetic number, because the mean of its divisors is an integer number (4010896655416).

Almost surely, 2^{8021793310831} is an apocalyptic number.

8021793310831 is a deficient number, since it is larger than the sum of its proper divisors (1).

8021793310831 is an equidigital number, since it uses as much as digits as its factorization.

8021793310831 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 217728, while the sum is 46.

The spelling of 8021793310831 in words is "eight trillion, twenty-one billion, seven hundred ninety-three million, three hundred ten thousand, eight hundred thirty-one".