21950116650 has 288 divisors, whose sum is σ = 73955980800. Its totient is φ = 4534300800.

The previous prime is 21950116637. The next prime is 21950116691. The reversal of 21950116650 is 5661105912.

It is an unprimeable number.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 6200581 + ... + 6204119.

It is an arithmetic number, because the mean of its divisors is an integer number (256791600).

Almost surely, 2^21950116650 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21950116650, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (36977990400).

21950116650 is an abundant number, since it is smaller than the sum of its proper divisors (52005864150).

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

21950116650 is a wasteful number, since it uses less digits than its factorization.

21950116650 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3754 (or 3746 counting only the distinct ones).

The product of its (nonzero) digits is 16200, while the sum is 36.

The spelling of 21950116650 in words is "twenty-one billion, nine hundred fifty million, one hundred sixteen thousand, six hundred fifty".