20410665640653 has 16 divisors (see below), whose sum is σ = 27840110344640. Its totient is φ = 13297585843584.

The previous prime is 20410665640609. The next prime is 20410665640657. The reversal of 20410665640653 is 35604656601402.

It is not a de Polignac number, because 20410665640653 - 2¹⁰ = 20410665639629 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20410665640657) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 427496251 + ... + 427543992.

It is an arithmetic number, because the mean of its divisors is an integer number (1740006896540).

Almost surely, 2^{20410665640653} is an apocalyptic number.

It is an amenable number.

20410665640653 is a deficient number, since it is larger than the sum of its proper divisors (7429444703987).

20410665640653 is a wasteful number, since it uses less digits than its factorization.

20410665640653 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 855040428.

The product of its (nonzero) digits is 3110400, while the sum is 48.

The spelling of 20410665640653 in words is "twenty trillion, four hundred ten billion, six hundred sixty-five million, six hundred forty thousand, six hundred fifty-three".