21008844662 has 8 divisors (see below), whose sum is σ = 33937364496. Its totient is φ = 9696389832.

The previous prime is 21008844653. The next prime is 21008844707. The reversal of 21008844662 is 26644880012.

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

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, 404016218 + ... + 404016269.

It is an arithmetic number, because the mean of its divisors is an integer number (4242170562).

Almost surely, 2^21008844662 is an apocalyptic number.

21008844662 is a deficient number, since it is larger than the sum of its proper divisors (12928519834).

21008844662 is a wasteful number, since it uses less digits than its factorization.

21008844662 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 808032502.

The product of its (nonzero) digits is 147456, while the sum is 41.

The spelling of 21008844662 in words is "twenty-one billion, eight million, eight hundred forty-four thousand, six hundred sixty-two".