21690176495266 has 8 divisors (see below), whose sum is σ = 32545531481580. Its totient is φ = 10841666001408.

The previous prime is 21690176495243. The next prime is 21690176495279. The reversal of 21690176495266 is 66259467109612.

It can be written as a sum of positive squares in 2 ways, for example, as 15590091568041 + 6100084927225 = 3948429^2 + 2469835^2 .

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

It is a junction number, because it is equal to n+sod(n) for n = 21690176495198 and 21690176495207.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1711115191 + ... + 1711127866.

Almost surely, 2^{21690176495266} is an apocalyptic number.

21690176495266 is a deficient number, since it is larger than the sum of its proper divisors (10855354986314).

21690176495266 is a wasteful number, since it uses less digits than its factorization.

21690176495266 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3422246228.

The product of its (nonzero) digits is 58786560, while the sum is 64.

The spelling of 21690176495266 in words is "twenty-one trillion, six hundred ninety billion, one hundred seventy-six million, four hundred ninety-five thousand, two hundred sixty-six".