20655166736361 has 4 divisors (see below), whose sum is σ = 27540222315152. Its totient is φ = 13770111157572.

The previous prime is 20655166736329. The next prime is 20655166736401. The reversal of 20655166736361 is 16363766155602.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 20655166736361 - 2⁵ = 20655166736329 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20655166731361) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3442527789391 + ... + 3442527789396.

It is an arithmetic number, because the mean of its divisors is an integer number (6885055578788).

Almost surely, 2^{20655166736361} is an apocalyptic number.

It is an amenable number.

20655166736361 is a deficient number, since it is larger than the sum of its proper divisors (6885055578791).

20655166736361 is an equidigital number, since it uses as much as digits as its factorization.

20655166736361 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6885055578790.

The product of its (nonzero) digits is 24494400, while the sum is 57.

The spelling of 20655166736361 in words is "twenty trillion, six hundred fifty-five billion, one hundred sixty-six million, seven hundred thirty-six thousand, three hundred sixty-one".