20695903601 has 2 divisors, whose sum is σ = 20695903602. Its totient is φ = 20695903600.

The previous prime is 20695903559. The next prime is 20695903619. The reversal of 20695903601 is 10630959602.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 20270925376 + 424978225 = 142376^2 + 20615^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20695903601 is a prime.

It is not a weakly prime, because it can be changed into another prime (20695903651) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10347951800 + 10347951801.

It is an arithmetic number, because the mean of its divisors is an integer number (10347951801).

Almost surely, 2^20695903601 is an apocalyptic number.

It is an amenable number.

20695903601 is a deficient number, since it is larger than the sum of its proper divisors (1).

20695903601 is an equidigital number, since it uses as much as digits as its factorization.

20695903601 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 87480, while the sum is 41.

The spelling of 20695903601 in words is "twenty billion, six hundred ninety-five million, nine hundred three thousand, six hundred one".