21703829956 has 12 divisors (see below), whose sum is σ = 38140623360. Its totient is φ = 10806509000.

The previous prime is 21703829893. The next prime is 21703829971. The reversal of 21703829956 is 65992830712.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11350420 + ... + 11352331.

It is an arithmetic number, because the mean of its divisors is an integer number (3178385280).

Almost surely, 2^21703829956 is an apocalyptic number.

It is an amenable number.

21703829956 is a deficient number, since it is larger than the sum of its proper divisors (16436793404).

21703829956 is a wasteful number, since it uses less digits than its factorization.

21703829956 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22702994 (or 22702992 counting only the distinct ones).

The product of its (nonzero) digits is 1632960, while the sum is 52.

The spelling of 21703829956 in words is "twenty-one billion, seven hundred three million, eight hundred twenty-nine thousand, nine hundred fifty-six".