20695701329 has 2 divisors, whose sum is σ = 20695701330. Its totient is φ = 20695701328.

The previous prime is 20695701319. The next prime is 20695701331. The reversal of 20695701329 is 92310759602.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11146502929 + 9549198400 = 105577^2 + 97720^2 .

It is a cyclic number.

It is not a de Polignac number, because 20695701329 - 2¹² = 20695697233 is a prime.

It is a Sophie Germain prime.

Together with 20695701331, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 20695701329.

It is not a weakly prime, because it can be changed into another prime (20695701319) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10347850664 + 10347850665.

It is an arithmetic number, because the mean of its divisors is an integer number (10347850665).

Almost surely, 2^20695701329 is an apocalyptic number.

It is an amenable number.

20695701329 is a deficient number, since it is larger than the sum of its proper divisors (1).

20695701329 is an equidigital number, since it uses as much as digits as its factorization.

20695701329 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 204120, while the sum is 44.

The spelling of 20695701329 in words is "twenty billion, six hundred ninety-five million, seven hundred one thousand, three hundred twenty-nine".