20727544055165 has 8 divisors (see below), whose sum is σ = 24878220784728. Its totient is φ = 16578589965120.

The previous prime is 20727544055089. The next prime is 20727544055173. The reversal of 20727544055165 is 56155044572702.

It can be written as a sum of positive squares in 4 ways, for example, as 8280386084356 + 12447157970809 = 2877566^2 + 3528053^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 20727544055165 - 2²² = 20727539860861 is a prime.

It is a Duffinian number.

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, 430633406 + ... + 430681535.

It is an arithmetic number, because the mean of its divisors is an integer number (3109777598091).

Almost surely, 2^{20727544055165} is an apocalyptic number.

It is an amenable number.

20727544055165 is a deficient number, since it is larger than the sum of its proper divisors (4150676729563).

20727544055165 is an equidigital number, since it uses as much as digits as its factorization.

20727544055165 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 861319759.

The product of its (nonzero) digits is 11760000, while the sum is 53.

The spelling of 20727544055165 in words is "twenty trillion, seven hundred twenty-seven billion, five hundred forty-four million, fifty-five thousand, one hundred sixty-five".