20395629901 has 2 divisors, whose sum is σ = 20395629902. Its totient is φ = 20395629900.

The previous prime is 20395629869. The next prime is 20395629911. The reversal of 20395629901 is 10992659302.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 18899100676 + 1496529225 = 137474^2 + 38685^2 .

It is a cyclic number.

It is not a de Polignac number, because 20395629901 - 2⁵ = 20395629869 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20395629911) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10197814950 + 10197814951.

It is an arithmetic number, because the mean of its divisors is an integer number (10197814951).

Almost surely, 2^20395629901 is an apocalyptic number.

It is an amenable number.

20395629901 is a deficient number, since it is larger than the sum of its proper divisors (1).

20395629901 is an equidigital number, since it uses as much as digits as its factorization.

20395629901 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 262440, while the sum is 46.

The spelling of 20395629901 in words is "twenty billion, three hundred ninety-five million, six hundred twenty-nine thousand, nine hundred one".