20564212160165 has 8 divisors (see below), whose sum is σ = 24871362109440. Its totient is φ = 16321831383312.

The previous prime is 20564212160159. The next prime is 20564212160231. The reversal of 20564212160165 is 56106121246502.

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 20564212160165 - 2³² = 20559917192869 is a prime.

It is a super-2 number, since 2×20564212160165² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16192292405 + ... + 16192293674.

It is an arithmetic number, because the mean of its divisors is an integer number (3108920263680).

Almost surely, 2^{20564212160165} is an apocalyptic number.

It is an amenable number.

20564212160165 is a deficient number, since it is larger than the sum of its proper divisors (4307149949275).

20564212160165 is a wasteful number, since it uses less digits than its factorization.

20564212160165 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32384586211.

The product of its (nonzero) digits is 172800, while the sum is 41.

The spelling of 20564212160165 in words is "twenty trillion, five hundred sixty-four billion, two hundred twelve million, one hundred sixty thousand, one hundred sixty-five".