20641019358901 has 2 divisors, whose sum is σ = 20641019358902. Its totient is φ = 20641019358900.

The previous prime is 20641019358889. The next prime is 20641019359003. The reversal of 20641019358901 is 10985391014602.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 18292309856401 + 2348709502500 = 4276951^2 + 1532550^2 .

It is a cyclic number.

It is not a de Polignac number, because 20641019358901 - 2³⁹ = 20091263545013 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20641019350901) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10320509679450 + 10320509679451.

It is an arithmetic number, because the mean of its divisors is an integer number (10320509679451).

Almost surely, 2^{20641019358901} is an apocalyptic number.

It is an amenable number.

20641019358901 is a deficient number, since it is larger than the sum of its proper divisors (1).

20641019358901 is an equidigital number, since it uses as much as digits as its factorization.

20641019358901 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 466560, while the sum is 49.

The spelling of 20641019358901 in words is "twenty trillion, six hundred forty-one billion, nineteen million, three hundred fifty-eight thousand, nine hundred one".