21828685027569 has 16 divisors (see below), whose sum is σ = 33392185219968. Its totient is φ = 12424999145472.

The previous prime is 21828685027549. The next prime is 21828685027649. The reversal of 21828685027569 is 96572058682812.

It is not a de Polignac number, because 21828685027569 - 2¹² = 21828685023473 is a prime.

It is a super-2 number, since 2×21828685027569² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21828685027549) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2022292642 + ... + 2022303435.

It is an arithmetic number, because the mean of its divisors is an integer number (2087011576248).

Almost surely, 2^{21828685027569} is an apocalyptic number.

It is an amenable number.

21828685027569 is a deficient number, since it is larger than the sum of its proper divisors (11563500192399).

21828685027569 is a wasteful number, since it uses less digits than its factorization.

21828685027569 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4044596344.

The product of its (nonzero) digits is 232243200, while the sum is 69.

The spelling of 21828685027569 in words is "twenty-one trillion, eight hundred twenty-eight billion, six hundred eighty-five million, twenty-seven thousand, five hundred sixty-nine".