21446501606 has 16 divisors (see below), whose sum is σ = 34159708800. Its totient is φ = 10063547520.

The previous prime is 21446501603. The next prime is 21446501621. The reversal of 21446501606 is 60610564412.

It is a super-2 number, since 2×21446501606² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21446501603) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 891830 + ... + 915561.

It is an arithmetic number, because the mean of its divisors is an integer number (2134981800).

Almost surely, 2^21446501606 is an apocalyptic number.

21446501606 is a deficient number, since it is larger than the sum of its proper divisors (12713207194).

21446501606 is a wasteful number, since it uses less digits than its factorization.

21446501606 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1807759.

The product of its (nonzero) digits is 34560, while the sum is 35.

The spelling of 21446501606 in words is "twenty-one billion, four hundred forty-six million, five hundred one thousand, six hundred six".