21063247326 has 48 divisors (see below), whose sum is σ = 51950471040. Its totient is φ = 6105287760.

The previous prime is 21063247313. The next prime is 21063247351. The reversal of 21063247326 is 62374236012.

21063247326 is a `hidden beast` number, since 2 + 1 + 0 + 6 + 324 + 7 + 326 = 666.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2308056 + ... + 2317163.

It is an arithmetic number, because the mean of its divisors is an integer number (1082301480).

Almost surely, 2^21063247326 is an apocalyptic number.

21063247326 is an abundant number, since it is smaller than the sum of its proper divisors (30887223714).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21063247326 is a wasteful number, since it uses less digits than its factorization.

21063247326 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4625261 (or 4625258 counting only the distinct ones).

The product of its (nonzero) digits is 72576, while the sum is 36.

The spelling of 21063247326 in words is "twenty-one billion, sixty-three million, two hundred forty-seven thousand, three hundred twenty-six".