21806011696 has 80 divisors (see below), whose sum is σ = 48590175744. Its totient is φ = 9286520832.

The previous prime is 21806011691. The next prime is 21806011709. The reversal of 21806011696 is 69611060812.

It is not an unprimeable number, because it can be changed into a prime (21806011691) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16995471 + ... + 16996753.

Almost surely, 2^21806011696 is an apocalyptic number.

It is an amenable number.

21806011696 is an abundant number, since it is smaller than the sum of its proper divisors (26784164048).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21806011696 is a wasteful number, since it uses less digits than its factorization.

21806011696 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2138 (or 2132 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 40.

The spelling of 21806011696 in words is "twenty-one billion, eight hundred six million, eleven thousand, six hundred ninety-six".