20116761616213 has 2 divisors, whose sum is σ = 20116761616214. Its totient is φ = 20116761616212.

The previous prime is 20116761616129. The next prime is 20116761616241. The reversal of 20116761616213 is 31261616761102.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 19215615807844 + 901145808369 = 4383562^2 + 949287^2 .

It is a cyclic number.

It is not a de Polignac number, because 20116761616213 - 2³³ = 20108171681621 is a prime.

It is a super-2 number, since 2×20116761616213² (a number of 27 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 20116761616213.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20116761616243) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10058380808106 + 10058380808107.

It is an arithmetic number, because the mean of its divisors is an integer number (10058380808107).

Almost surely, 2^{20116761616213} is an apocalyptic number.

It is an amenable number.

20116761616213 is a deficient number, since it is larger than the sum of its proper divisors (1).

20116761616213 is an equidigital number, since it uses as much as digits as its factorization.

20116761616213 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 108864, while the sum is 43.

The spelling of 20116761616213 in words is "twenty trillion, one hundred sixteen billion, seven hundred sixty-one million, six hundred sixteen thousand, two hundred thirteen".