20126662079 has 2 divisors, whose sum is σ = 20126662080. Its totient is φ = 20126662078.

The previous prime is 20126662069. The next prime is 20126662109. The reversal of 20126662079 is 97026662102.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20126662079 - 2¹² = 20126657983 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20126662069) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10063331039 + 10063331040.

It is an arithmetic number, because the mean of its divisors is an integer number (10063331040).

Almost surely, 2^20126662079 is an apocalyptic number.

20126662079 is a deficient number, since it is larger than the sum of its proper divisors (1).

20126662079 is an equidigital number, since it uses as much as digits as its factorization.

20126662079 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 108864, while the sum is 41.

The spelling of 20126662079 in words is "twenty billion, one hundred twenty-six million, six hundred sixty-two thousand, seventy-nine".