21831280206 has 8 divisors (see below), whose sum is σ = 43662560424. Its totient is φ = 7277093400.

The previous prime is 21831280199. The next prime is 21831280217. The reversal of 21831280206 is 60208213812.

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

21831280206 is an admirable number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1819273345 + ... + 1819273356.

It is an arithmetic number, because the mean of its divisors is an integer number (5457820053).

Almost surely, 2^21831280206 is an apocalyptic number.

21831280206 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.

21831280206 is a wasteful number, since it uses less digits than its factorization.

21831280206 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3638546706.

The product of its (nonzero) digits is 9216, while the sum is 33.

The spelling of 21831280206 in words is "twenty-one billion, eight hundred thirty-one million, two hundred eighty thousand, two hundred six".