21113680606 has 8 divisors (see below), whose sum is σ = 31671178200. Its totient is φ = 10556621208.

The previous prime is 21113680591. The next prime is 21113680613. The reversal of 21113680606 is 60608631112.

It is a happy number.

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, 69325 + ... + 216871.

It is an arithmetic number, because the mean of its divisors is an integer number (3958897275).

Almost surely, 2^21113680606 is an apocalyptic number.

21113680606 is a deficient number, since it is larger than the sum of its proper divisors (10557497594).

21113680606 is a wasteful number, since it uses less digits than its factorization.

21113680606 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 219098.

The product of its (nonzero) digits is 10368, while the sum is 34.

The spelling of 21113680606 in words is "twenty-one billion, one hundred thirteen million, six hundred eighty thousand, six hundred six".