20794420567 has 2 divisors, whose sum is σ = 20794420568. Its totient is φ = 20794420566.

The previous prime is 20794420561. The next prime is 20794420649. The reversal of 20794420567 is 76502449702.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20794420567 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20794420561) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10397210283 + 10397210284.

It is an arithmetic number, because the mean of its divisors is an integer number (10397210284).

Almost surely, 2^20794420567 is an apocalyptic number.

20794420567 is a deficient number, since it is larger than the sum of its proper divisors (1).

20794420567 is an equidigital number, since it uses as much as digits as its factorization.

20794420567 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 846720, while the sum is 46.

The spelling of 20794420567 in words is "twenty billion, seven hundred ninety-four million, four hundred twenty thousand, five hundred sixty-seven".