16221796210 has 8 divisors (see below), whose sum is σ = 29199233196. Its totient is φ = 6488718480.

The previous prime is 16221796181. The next prime is 16221796237. The reversal of 16221796210 is 1269712261.

It can be written as a sum of positive squares in 2 ways, for example, as 13195806129 + 3025990081 = 114873^2 + 55009^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 16221796210.

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, 811089801 + ... + 811089820.

Almost surely, 2^16221796210 is an apocalyptic number.

16221796210 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

16221796210 is a deficient number, since it is larger than the sum of its proper divisors (12977436986).

16221796210 is a wasteful number, since it uses less digits than its factorization.

16221796210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1622179628.

The product of its (nonzero) digits is 18144, while the sum is 37.

The spelling of 16221796210 in words is "sixteen billion, two hundred twenty-one million, seven hundred ninety-six thousand, two hundred ten".