21882306806 has 8 divisors (see below), whose sum is σ = 34754252040. Its totient is φ = 10297556128.

The previous prime is 21882306793. The next prime is 21882306847. The reversal of 21882306806 is 60860328812.

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, 321798596 + ... + 321798663.

It is an arithmetic number, because the mean of its divisors is an integer number (4344281505).

Almost surely, 2^21882306806 is an apocalyptic number.

21882306806 is a deficient number, since it is larger than the sum of its proper divisors (12871945234).

21882306806 is a wasteful number, since it uses less digits than its factorization.

21882306806 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 643597278.

The product of its (nonzero) digits is 221184, while the sum is 44.

The spelling of 21882306806 in words is "twenty-one billion, eight hundred eighty-two million, three hundred six thousand, eight hundred six".