20610661446 has 12 divisors (see below), whose sum is σ = 44656433172. Its totient is φ = 6870220476.

The previous prime is 20610661441. The next prime is 20610661507. The reversal of 20610661446 is 64416601602.

20610661446 is a `hidden beast` number, since 20 + 6 + 10 + 6 + 614 + 4 + 6 = 666.

It is a self number, because there is not a number n which added to its sum of digits gives 20610661446.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20610661441) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 572518356 + ... + 572518391.

It is an arithmetic number, because the mean of its divisors is an integer number (3721369431).

Almost surely, 2^20610661446 is an apocalyptic number.

20610661446 is an abundant number, since it is smaller than the sum of its proper divisors (24045771726).

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

20610661446 is a wasteful number, since it uses less digits than its factorization.

20610661446 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1145036755 (or 1145036752 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 36.

The spelling of 20610661446 in words is "twenty billion, six hundred ten million, six hundred sixty-one thousand, four hundred forty-six".