21171936530269 has 8 divisors (see below), whose sum is σ = 24759208168640. Its totient is φ = 17725342211136.

The previous prime is 21171936530243. The next prime is 21171936530287. The reversal of 21171936530269 is 96203563917112.

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

It is not a de Polignac number, because 21171936530269 - 2⁵ = 21171936530237 is a prime.

It is a super-2 number, since 2×21171936530269² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21171936530209) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 35169329484 + ... + 35169330085.

It is an arithmetic number, because the mean of its divisors is an integer number (3094901021080).

Almost surely, 2^{21171936530269} is an apocalyptic number.

It is an amenable number.

21171936530269 is a deficient number, since it is larger than the sum of its proper divisors (3587271638371).

21171936530269 is an equidigital number, since it uses as much as digits as its factorization.

21171936530269 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70338659619.

The product of its (nonzero) digits is 3674160, while the sum is 55.

The spelling of 21171936530269 in words is "twenty-one trillion, one hundred seventy-one billion, nine hundred thirty-six million, five hundred thirty thousand, two hundred sixty-nine".