20129934361 has 2 divisors, whose sum is σ = 20129934362. Its totient is φ = 20129934360.

The previous prime is 20129934281. The next prime is 20129934431. The reversal of 20129934361 is 16343992102.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 20112628761 + 17305600 = 141819^2 + 4160^2 .

It is a cyclic number.

It is not a de Polignac number, because 20129934361 - 2⁷ = 20129934233 is a prime.

It is not a weakly prime, because it can be changed into another prime (20129934961) 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, 10064967180 + 10064967181.

It is an arithmetic number, because the mean of its divisors is an integer number (10064967181).

Almost surely, 2^20129934361 is an apocalyptic number.

It is an amenable number.

20129934361 is a deficient number, since it is larger than the sum of its proper divisors (1).

20129934361 is an equidigital number, since it uses as much as digits as its factorization.

20129934361 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 69984, while the sum is 40.

The spelling of 20129934361 in words is "twenty billion, one hundred twenty-nine million, nine hundred thirty-four thousand, three hundred sixty-one".