20065617064621 has 8 divisors (see below), whose sum is σ = 20171670100704. Its totient is φ = 19959837714960.

The previous prime is 20065617064609. The next prime is 20065617064651. The reversal of 20065617064621 is 12646071656002.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20065617064621 - 2¹¹ = 20065617062573 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20065617064601) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 68274586 + ... + 68567851.

It is an arithmetic number, because the mean of its divisors is an integer number (2521458762588).

Almost surely, 2^{20065617064621} is an apocalyptic number.

It is an amenable number.

20065617064621 is a deficient number, since it is larger than the sum of its proper divisors (106053036083).

20065617064621 is a wasteful number, since it uses less digits than its factorization.

20065617064621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 136843211.

The product of its (nonzero) digits is 725760, while the sum is 46.

The spelling of 20065617064621 in words is "twenty trillion, sixty-five billion, six hundred seventeen million, sixty-four thousand, six hundred twenty-one".