20896186081 has 2 divisors, whose sum is σ = 20896186082. Its totient is φ = 20896186080.

The previous prime is 20896186063. The next prime is 20896186093. The reversal of 20896186081 is 18068169802.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 19892563681 + 1003622400 = 141041^2 + 31680^2 .

It is a cyclic number.

It is not a de Polignac number, because 20896186081 - 2⁵ = 20896186049 is a prime.

It is a super-2 number, since 2×20896186081² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (20896196081) 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 as a sum of consecutive naturals, namely, 10448093040 + 10448093041.

It is an arithmetic number, because the mean of its divisors is an integer number (10448093041).

Almost surely, 2^20896186081 is an apocalyptic number.

It is an amenable number.

20896186081 is a deficient number, since it is larger than the sum of its proper divisors (1).

20896186081 is an equidigital number, since it uses as much as digits as its factorization.

20896186081 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 331776, while the sum is 49.

The spelling of 20896186081 in words is "twenty billion, eight hundred ninety-six million, one hundred eighty-six thousand, eighty-one".