21265823327 has 8 divisors (see below), whose sum is σ = 24305335296. Its totient is φ = 18226695672.

The previous prime is 21265823291. The next prime is 21265823339. The reversal of 21265823327 is 72332856212.

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

It is a cyclic number.

It is not a de Polignac number, because 21265823327 - 2¹⁶ = 21265757791 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21265823027) 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, 34298 + ... + 209064.

It is an arithmetic number, because the mean of its divisors is an integer number (3038166912).

Almost surely, 2^21265823327 is an apocalyptic number.

21265823327 is a deficient number, since it is larger than the sum of its proper divisors (3039511969).

21265823327 is a wasteful number, since it uses less digits than its factorization.

21265823327 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 192157.

The product of its digits is 241920, while the sum is 41.

The spelling of 21265823327 in words is "twenty-one billion, two hundred sixty-five million, eight hundred twenty-three thousand, three hundred twenty-seven".