20705381743027 has 2 divisors, whose sum is σ = 20705381743028. Its totient is φ = 20705381743026.

The previous prime is 20705381743019. The next prime is 20705381743117. The reversal of 20705381743027 is 72034718350702.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20705381743027 - 2³ = 20705381743019 is a prime.

It is not a weakly prime, because it can be changed into another prime (20705381743427) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10352690871513 + 10352690871514.

It is an arithmetic number, because the mean of its divisors is an integer number (10352690871514).

Almost surely, 2^{20705381743027} is an apocalyptic number.

20705381743027 is a deficient number, since it is larger than the sum of its proper divisors (1).

20705381743027 is an equidigital number, since it uses as much as digits as its factorization.

20705381743027 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1975680, while the sum is 49.

The spelling of 20705381743027 in words is "twenty trillion, seven hundred five billion, three hundred eighty-one million, seven hundred forty-three thousand, twenty-seven".