21256063014662 has 16 divisors (see below), whose sum is σ = 36683521984800. Its totient is φ = 9048602087808.

The previous prime is 21256063014649. The next prime is 21256063014701. The reversal of 21256063014662 is 26641036065212.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

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 in 7 ways as a sum of consecutive naturals, for example, 5094931523 + ... + 5094935694.

It is an arithmetic number, because the mean of its divisors is an integer number (2292720124050).

Almost surely, 2^{21256063014662} is an apocalyptic number.

21256063014662 is a deficient number, since it is larger than the sum of its proper divisors (15427458970138).

21256063014662 is a wasteful number, since it uses less digits than its factorization.

21256063014662 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10189867375.

The product of its (nonzero) digits is 622080, while the sum is 44.

Adding to 21256063014662 its reverse (26641036065212), we get a palindrome (47897099079874).

The spelling of 21256063014662 in words is "twenty-one trillion, two hundred fifty-six billion, sixty-three million, fourteen thousand, six hundred sixty-two".