21676833678 has 8 divisors (see below), whose sum is σ = 43353667368. Its totient is φ = 7225611224.

The previous prime is 21676833617. The next prime is 21676833679. The reversal of 21676833678 is 87633867612.

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

21676833678 is an admirable number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21676833679) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1806402801 + ... + 1806402812.

It is an arithmetic number, because the mean of its divisors is an integer number (5419208421).

Almost surely, 2^21676833678 is an apocalyptic number.

21676833678 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21676833678 is a wasteful number, since it uses less digits than its factorization.

21676833678 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3612805618.

The product of its digits is 12192768, while the sum is 57.

The spelling of 21676833678 in words is "twenty-one billion, six hundred seventy-six million, eight hundred thirty-three thousand, six hundred seventy-eight".