20650212322561 has 8 divisors (see below), whose sum is σ = 20937659834880. Its totient is φ = 20362888266912.

The previous prime is 20650212322549. The next prime is 20650212322613. The reversal of 20650212322561 is 16522321205602.

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 20650212322561 - 2³⁵ = 20615852584193 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20650212322561.

It is not an unprimeable number, because it can be changed into a prime (20650212322511) 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, 30527281 + ... + 31196398.

It is an arithmetic number, because the mean of its divisors is an integer number (2617207479360).

Almost surely, 2^{20650212322561} is an apocalyptic number.

It is an amenable number.

20650212322561 is a deficient number, since it is larger than the sum of its proper divisors (287447512319).

20650212322561 is an equidigital number, since it uses as much as digits as its factorization.

20650212322561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61728335.

The product of its (nonzero) digits is 86400, while the sum is 37.

The spelling of 20650212322561 in words is "twenty trillion, six hundred fifty billion, two hundred twelve million, three hundred twenty-two thousand, five hundred sixty-one".