21950799657394 has 16 divisors (see below), whose sum is σ = 34679296421280. Its totient is φ = 10391705485920.

The previous prime is 21950799657389. The next prime is 21950799657419. The reversal of 21950799657394 is 49375699705912.

It is a self number, because there is not a number n which added to its sum of digits gives 21950799657394.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 167759304 + ... + 167890099.

It is an arithmetic number, because the mean of its divisors is an integer number (2167456026330).

Almost surely, 2^{21950799657394} is an apocalyptic number.

21950799657394 is a deficient number, since it is larger than the sum of its proper divisors (12728496763886).

21950799657394 is a wasteful number, since it uses less digits than its factorization.

21950799657394 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 335651145.

The product of its (nonzero) digits is 1157360400, while the sum is 76.

The spelling of 21950799657394 in words is "twenty-one trillion, nine hundred fifty billion, seven hundred ninety-nine million, six hundred fifty-seven thousand, three hundred ninety-four".