20530542226661 has 8 divisors (see below), whose sum is σ = 20837104802400. Its totient is φ = 20223983667888.

The previous prime is 20530542226577. The next prime is 20530542226681. The reversal of 20530542226661 is 16662224503502.

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 20530542226661 - 2²⁶ = 20530475117797 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 (20530542226681) 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, 10224350 + ... + 12066416.

It is an arithmetic number, because the mean of its divisors is an integer number (2604638100300).

Almost surely, 2^{20530542226661} is an apocalyptic number.

It is an amenable number.

20530542226661 is a deficient number, since it is larger than the sum of its proper divisors (306562575739).

20530542226661 is a wasteful number, since it uses less digits than its factorization.

20530542226661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2008483.

The product of its (nonzero) digits is 1036800, while the sum is 44.

The spelling of 20530542226661 in words is "twenty trillion, five hundred thirty billion, five hundred forty-two million, two hundred twenty-six thousand, six hundred sixty-one".