21215035006 has 8 divisors (see below), whose sum is σ = 34715511864. Its totient is φ = 9643197720.

The previous prime is 21215035003. The next prime is 21215035027. The reversal of 21215035006 is 60053051212.

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 (21215035003) 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, 482159865 + ... + 482159908.

It is an arithmetic number, because the mean of its divisors is an integer number (4339438983).

Almost surely, 2^21215035006 is an apocalyptic number.

21215035006 is a deficient number, since it is larger than the sum of its proper divisors (13500476858).

21215035006 is a wasteful number, since it uses less digits than its factorization.

21215035006 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 964319786.

The product of its (nonzero) digits is 1800, while the sum is 25.

Adding to 21215035006 its reverse (60053051212), we get a palindrome (81268086218).

The spelling of 21215035006 in words is "twenty-one billion, two hundred fifteen million, thirty-five thousand, six".