21650204708 has 12 divisors (see below), whose sum is σ = 41332209072. Its totient is φ = 9841002120.

The previous prime is 21650204699. The next prime is 21650204711. The reversal of 21650204708 is 80740205612.

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, 246025010 + ... + 246025097.

It is an arithmetic number, because the mean of its divisors is an integer number (3444350756).

Almost surely, 2^21650204708 is an apocalyptic number.

It is an amenable number.

21650204708 is a deficient number, since it is larger than the sum of its proper divisors (19682004364).

21650204708 is a wasteful number, since it uses less digits than its factorization.

21650204708 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 492050122 (or 492050120 counting only the distinct ones).

The product of its (nonzero) digits is 26880, while the sum is 35.

The spelling of 21650204708 in words is "twenty-one billion, six hundred fifty million, two hundred four thousand, seven hundred eight".