21065356006 has 8 divisors (see below), whose sum is σ = 31629921984. Its totient is φ = 10522048680.

The previous prime is 21065355953. The next prime is 21065356007. The reversal of 21065356006 is 60065356012.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21065356007) 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, 5312185 + ... + 5316148.

It is an arithmetic number, because the mean of its divisors is an integer number (3953740248).

Almost surely, 2^21065356006 is an apocalyptic number.

21065356006 is a deficient number, since it is larger than the sum of its proper divisors (10564565978).

21065356006 is a wasteful number, since it uses less digits than its factorization.

21065356006 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10629326.

The product of its (nonzero) digits is 32400, while the sum is 34.

The spelling of 21065356006 in words is "twenty-one billion, sixty-five million, three hundred fifty-six thousand, six".