20826375391291 has 2 divisors, whose sum is σ = 20826375391292. Its totient is φ = 20826375391290.

The previous prime is 20826375391243. The next prime is 20826375391309. The reversal of 20826375391291 is 19219357362802.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20826375391291 - 2⁷ = 20826375391163 is a prime.

It is not a weakly prime, because it can be changed into another prime (20826375391091) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10413187695645 + 10413187695646.

It is an arithmetic number, because the mean of its divisors is an integer number (10413187695646).

Almost surely, 2^{20826375391291} is an apocalyptic number.

20826375391291 is a deficient number, since it is larger than the sum of its proper divisors (1).

20826375391291 is an equidigital number, since it uses as much as digits as its factorization.

20826375391291 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 9797760, while the sum is 58.

The spelling of 20826375391291 in words is "twenty trillion, eight hundred twenty-six billion, three hundred seventy-five million, three hundred ninety-one thousand, two hundred ninety-one".