20446042666 has 32 divisors (see below), whose sum is σ = 36618065280. Its totient is φ = 8376648000.

The previous prime is 20446042651. The next prime is 20446042697. The reversal of 20446042666 is 66624064402.

It is an unprimeable number.

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, 208300 + ... + 290311.

It is an arithmetic number, because the mean of its divisors is an integer number (1144314540).

Almost surely, 2^20446042666 is an apocalyptic number.

20446042666 is a deficient number, since it is larger than the sum of its proper divisors (16172022614).

20446042666 is a wasteful number, since it uses less digits than its factorization.

20446042666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 498750.

The product of its (nonzero) digits is 331776, while the sum is 40.

The spelling of 20446042666 in words is "twenty billion, four hundred forty-six million, forty-two thousand, six hundred sixty-six".