21266796219 has 8 divisors (see below), whose sum is σ = 28417239312. Its totient is φ = 14147108640.

The previous prime is 21266796169. The next prime is 21266796241. The reversal of 21266796219 is 91269766212.

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

It is not a de Polignac number, because 21266796219 - 2¹⁹ = 21266271931 is a prime.

It is a super-2 number, since 2×21266796219² (a number of 21 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (51) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (21266796259) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7687264 + ... + 7690029.

It is an arithmetic number, because the mean of its divisors is an integer number (3552154914).

Almost surely, 2^21266796219 is an apocalyptic number.

21266796219 is a deficient number, since it is larger than the sum of its proper divisors (7150443093).

21266796219 is a wasteful number, since it uses less digits than its factorization.

21266796219 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15377757.

The product of its digits is 979776, while the sum is 51.

The spelling of 21266796219 in words is "twenty-one billion, two hundred sixty-six million, seven hundred ninety-six thousand, two hundred nineteen".