20794420079 has 2 divisors, whose sum is σ = 20794420080. Its totient is φ = 20794420078.

The previous prime is 20794420001. The next prime is 20794420103. The reversal of 20794420079 is 97002449702.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20794420079 - 2⁸ = 20794419823 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20794420379) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10397210039 + 10397210040.

It is an arithmetic number, because the mean of its divisors is an integer number (10397210040).

Almost surely, 2^20794420079 is an apocalyptic number.

20794420079 is a deficient number, since it is larger than the sum of its proper divisors (1).

20794420079 is an equidigital number, since it uses as much as digits as its factorization.

20794420079 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 254016, while the sum is 44.

The spelling of 20794420079 in words is "twenty billion, seven hundred ninety-four million, four hundred twenty thousand, seventy-nine".