21896707227 has 16 divisors (see below), whose sum is σ = 30474455040. Its totient is φ = 13958776832.

The previous prime is 21896707213. The next prime is 21896707237. The reversal of 21896707227 is 72270769812.

It is a cyclic number.

It is not a de Polignac number, because 21896707227 - 2⁷ = 21896707099 is a prime.

It is a Smith number, since the sum of its digits (51) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a self number, because there is not a number n which added to its sum of digits gives 21896707227.

It is not an unprimeable number, because it can be changed into a prime (21896707237) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 182038 + ... + 277364.

It is an arithmetic number, because the mean of its divisors is an integer number (1904653440).

Almost surely, 2^21896707227 is an apocalyptic number.

21896707227 is a deficient number, since it is larger than the sum of its proper divisors (8577747813).

21896707227 is a wasteful number, since it uses less digits than its factorization.

21896707227 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 98682.

The product of its (nonzero) digits is 1185408, while the sum is 51.

The spelling of 21896707227 in words is "twenty-one billion, eight hundred ninety-six million, seven hundred seven thousand, two hundred twenty-seven".