20091050821067 has 2 divisors, whose sum is σ = 20091050821068. Its totient is φ = 20091050821066.

The previous prime is 20091050821027. The next prime is 20091050821069. The reversal of 20091050821067 is 76012805019002.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20091050821067 is a prime.

Together with 20091050821069, 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 (20091050821069) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10045525410533 + 10045525410534.

It is an arithmetic number, because the mean of its divisors is an integer number (10045525410534).

Almost surely, 2^{20091050821067} is an apocalyptic number.

20091050821067 is a deficient number, since it is larger than the sum of its proper divisors (1).

20091050821067 is an equidigital number, since it uses as much as digits as its factorization.

20091050821067 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 60480, while the sum is 41.

The spelling of 20091050821067 in words is "twenty trillion, ninety-one billion, fifty million, eight hundred twenty-one thousand, sixty-seven".