20711061989165 has 16 divisors (see below), whose sum is σ = 25196570906880. Its totient is φ = 16340463547200.

The previous prime is 20711061989159. The next prime is 20711061989183. The reversal of 20711061989165 is 56198916011702.

It is not a de Polignac number, because 20711061989165 - 2¹⁴ = 20711061972781 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20711061989165.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 29547011 + ... + 30239840.

It is an arithmetic number, because the mean of its divisors is an integer number (1574785681680).

Almost surely, 2^{20711061989165} is an apocalyptic number.

It is an amenable number.

20711061989165 is a deficient number, since it is larger than the sum of its proper divisors (4485508917715).

20711061989165 is an equidigital number, since it uses as much as digits as its factorization.

20711061989165 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 59787812.

The product of its (nonzero) digits is 1632960, while the sum is 56.

The spelling of 20711061989165 in words is "twenty trillion, seven hundred eleven billion, sixty-one million, nine hundred eighty-nine thousand, one hundred sixty-five".