20446656 has 56 divisors (see below), whose sum is σ = 54650640. Its totient is φ = 6746112.

The previous prime is 20446649. The next prime is 20446667. The reversal of 20446656 is 65664402.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20440 + ... + 21416.

Almost surely, 2^20446656 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20446656, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27325320).

20446656 is an abundant number, since it is smaller than the sum of its proper divisors (34203984).

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

20446656 is a wasteful number, since it uses less digits than its factorization.

20446656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1101 (or 1091 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 33.

The square root of 20446656 is about 4521.7978725281. The cubic root of 20446656 is about 273.4475879010.

The spelling of 20446656 in words is "twenty million, four hundred forty-six thousand, six hundred fifty-six".