21081047006 has 8 divisors (see below), whose sum is σ = 31625347320. Its totient is φ = 10539264568.

The previous prime is 21081046993. The next prime is 21081047011. The reversal of 21081047006 is 60074018012.

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

It is a self number, because there is not a number n which added to its sum of digits gives 21081047006.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 608396 + ... + 642111.

It is an arithmetic number, because the mean of its divisors is an integer number (3953168415).

Almost surely, 2^21081047006 is an apocalyptic number.

21081047006 is a deficient number, since it is larger than the sum of its proper divisors (10544300314).

21081047006 is a wasteful number, since it uses less digits than its factorization.

21081047006 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1258938.

The product of its (nonzero) digits is 2688, while the sum is 29.

The spelling of 21081047006 in words is "twenty-one billion, eighty-one million, forty-seven thousand, six".