20565550630201 has 4 divisors (see below), whose sum is σ = 21043819249552. Its totient is φ = 20087282010852.

The previous prime is 20565550630199. The next prime is 20565550630211. The reversal of 20565550630201 is 10203605556502.

It is a happy number.

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 a cyclic number.

It is not a de Polignac number, because 20565550630201 - 2¹ = 20565550630199 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20565550630211) 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, 239134309611 + ... + 239134309696.

It is an arithmetic number, because the mean of its divisors is an integer number (5260954812388).

Almost surely, 2^{20565550630201} is an apocalyptic number.

It is an amenable number.

20565550630201 is a deficient number, since it is larger than the sum of its proper divisors (478268619351).

20565550630201 is an equidigital number, since it uses as much as digits as its factorization.

20565550630201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 478268619350.

The product of its (nonzero) digits is 270000, while the sum is 40.

The spelling of 20565550630201 in words is "twenty trillion, five hundred sixty-five billion, five hundred fifty million, six hundred thirty thousand, two hundred one".