20294740669109 has 2 divisors, whose sum is σ = 20294740669110. Its totient is φ = 20294740669108.

The previous prime is 20294740669097. The next prime is 20294740669123. The reversal of 20294740669109 is 90196604749202.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 14217258454084 + 6077482215025 = 3770578^2 + 2465255^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20294740669109 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20294740669129) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10147370334554 + 10147370334555.

It is an arithmetic number, because the mean of its divisors is an integer number (10147370334555).

Almost surely, 2^{20294740669109} is an apocalyptic number.

It is an amenable number.

20294740669109 is a deficient number, since it is larger than the sum of its proper divisors (1).

20294740669109 is an equidigital number, since it uses as much as digits as its factorization.

20294740669109 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 11757312, while the sum is 59.

The spelling of 20294740669109 in words is "twenty trillion, two hundred ninety-four billion, seven hundred forty million, six hundred sixty-nine thousand, one hundred nine".