21656053512332 has 6 divisors (see below), whose sum is σ = 37898093646588. Its totient is φ = 10828026756164.

The previous prime is 21656053512277. The next prime is 21656053512361. The reversal of 21656053512332 is 23321535065612.

It is a happy 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 as a sum of consecutive naturals, namely, 2707006689038 + ... + 2707006689045.

It is an arithmetic number, because the mean of its divisors is an integer number (6316348941098).

Almost surely, 2^{21656053512332} is an apocalyptic number.

It is an amenable number.

21656053512332 is a deficient number, since it is larger than the sum of its proper divisors (16242040134256).

21656053512332 is a wasteful number, since it uses less digits than its factorization.

21656053512332 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5414013378087 (or 5414013378085 counting only the distinct ones).

The product of its (nonzero) digits is 972000, while the sum is 44.

Adding to 21656053512332 its reverse (23321535065612), we get a palindrome (44977588577944).

The spelling of 21656053512332 in words is "twenty-one trillion, six hundred fifty-six billion, fifty-three million, five hundred twelve thousand, three hundred thirty-two".