21082777329 has 8 divisors (see below), whose sum is σ = 28177460640. Its totient is φ = 14021639456.

The previous prime is 21082777327. The next prime is 21082777343. The reversal of 21082777329 is 92377728012.

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 21082777329 - 2¹ = 21082777327 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21082777327) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8384892 + ... + 8387405.

It is an arithmetic number, because the mean of its divisors is an integer number (3522182580).

Almost surely, 2^21082777329 is an apocalyptic number.

It is an amenable number.

21082777329 is a deficient number, since it is larger than the sum of its proper divisors (7094683311).

21082777329 is a wasteful number, since it uses less digits than its factorization.

21082777329 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16772719.

The product of its (nonzero) digits is 592704, while the sum is 48.

The spelling of 21082777329 in words is "twenty-one billion, eighty-two million, seven hundred seventy-seven thousand, three hundred twenty-nine".