21340535056 has 45 divisors (see below), whose sum is σ = 42128024151. Its totient is φ = 10472469792.

The previous prime is 21340535053. The next prime is 21340535093. The reversal of 21340535056 is 65053504312.

The square root of 21340535056 is 146084.

It is a perfect power (a square), and thus also a powerful number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21340535053) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 34475515 + ... + 34476133.

Almost surely, 2^21340535056 is an apocalyptic number.

21340535056 is the 146084-th square number.

It is an amenable number.

21340535056 is a deficient number, since it is larger than the sum of its proper divisors (20787489095).

21340535056 is an frugal number, since it uses more digits than its factorization.

21340535056 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1364 (or 680 counting only the distinct ones).

The product of its (nonzero) digits is 54000, while the sum is 34.

The spelling of 21340535056 in words is "twenty-one billion, three hundred forty million, five hundred thirty-five thousand, fifty-six".