20116765254637 has 2 divisors, whose sum is σ = 20116765254638. Its totient is φ = 20116765254636.

The previous prime is 20116765254631. The next prime is 20116765254667. The reversal of 20116765254637 is 73645256761102.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 18330891168681 + 1785874085956 = 4281459^2 + 1336366^2 .

It is a cyclic number.

It is not a de Polignac number, because 20116765254637 - 2¹¹ = 20116765252589 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20116765254631) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10058382627318 + 10058382627319.

It is an arithmetic number, because the mean of its divisors is an integer number (10058382627319).

Almost surely, 2^{20116765254637} is an apocalyptic number.

It is an amenable number.

20116765254637 is a deficient number, since it is larger than the sum of its proper divisors (1).

20116765254637 is an equidigital number, since it uses as much as digits as its factorization.

20116765254637 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12700800, while the sum is 55.

The spelling of 20116765254637 in words is "twenty trillion, one hundred sixteen billion, seven hundred sixty-five million, two hundred fifty-four thousand, six hundred thirty-seven".