20900445866 has 8 divisors (see below), whose sum is σ = 31451475744. Its totient is φ = 10416620620.

The previous prime is 20900445833. The next prime is 20900445877. The reversal of 20900445866 is 66854400902.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16800380 + ... + 16801623.

It is an arithmetic number, because the mean of its divisors is an integer number (3931434468).

Almost surely, 2^20900445866 is an apocalyptic number.

20900445866 is a deficient number, since it is larger than the sum of its proper divisors (10551029878).

20900445866 is a wasteful number, since it uses less digits than its factorization.

20900445866 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33602316.

The product of its (nonzero) digits is 414720, while the sum is 44.

The spelling of 20900445866 in words is "twenty billion, nine hundred million, four hundred forty-five thousand, eight hundred sixty-six".