20066397941 has 2 divisors, whose sum is σ = 20066397942. Its totient is φ = 20066397940.

The previous prime is 20066397917. The next prime is 20066397943. The reversal of 20066397941 is 14979366002.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 15611502916 + 4454895025 = 124946^2 + 66745^2 .

It is a cyclic number.

It is not a de Polignac number, because 20066397941 - 2¹⁸ = 20066135797 is a prime.

Together with 20066397943, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20066397943) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10033198970 + 10033198971.

It is an arithmetic number, because the mean of its divisors is an integer number (10033198971).

Almost surely, 2^20066397941 is an apocalyptic number.

It is an amenable number.

20066397941 is a deficient number, since it is larger than the sum of its proper divisors (1).

20066397941 is an equidigital number, since it uses as much as digits as its factorization.

20066397941 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 489888, while the sum is 47.

The spelling of 20066397941 in words is "twenty billion, sixty-six million, three hundred ninety-seven thousand, nine hundred forty-one".