20116765254661 has 4 divisors (see below), whose sum is σ = 20116799020492. Its totient is φ = 20116731488832.

The previous prime is 20116765254637. The next prime is 20116765254667. The reversal of 20116765254661 is 16645256761102.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 12392645861761 + 7724119392900 = 3520319^2 + 2779230^2 .

It is a cyclic number.

It is not a de Polignac number, because 20116765254661 - 2⁷ = 20116765254533 is a prime.

It is a super-2 number, since 2×20116765254661² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20116765254599 and 20116765254608.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20116765254667) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15972906 + ... + 17186251.

It is an arithmetic number, because the mean of its divisors is an integer number (5029199755123).

Almost surely, 2^{20116765254661} is an apocalyptic number.

It is an amenable number.

20116765254661 is a deficient number, since it is larger than the sum of its proper divisors (33765831).

20116765254661 is an equidigital number, since it uses as much as digits as its factorization.

20116765254661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33765830.

The product of its (nonzero) digits is 3628800, while the sum is 52.

The spelling of 20116765254661 in words is "twenty trillion, one hundred sixteen billion, seven hundred sixty-five million, two hundred fifty-four thousand, six hundred sixty-one".