21106450766 has 8 divisors (see below), whose sum is σ = 31681057824. Its totient is φ = 10546098160.

The previous prime is 21106450753. The next prime is 21106450801. The reversal of 21106450766 is 66705460112.

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, 3559910 + ... + 3565833.

It is an arithmetic number, because the mean of its divisors is an integer number (3960132228).

Almost surely, 2^21106450766 is an apocalyptic number.

21106450766 is a deficient number, since it is larger than the sum of its proper divisors (10574607058).

21106450766 is a wasteful number, since it uses less digits than its factorization.

21106450766 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7127226.

The product of its (nonzero) digits is 60480, while the sum is 38.

The spelling of 21106450766 in words is "twenty-one billion, one hundred six million, four hundred fifty thousand, seven hundred sixty-six".