20244402666 has 48 divisors (see below), whose sum is σ = 46096056864. Its totient is φ = 6413051232.

The previous prime is 20244402641. The next prime is 20244402707. The reversal of 20244402666 is 66620444202.

It is a self number, because there is not a number n which added to its sum of digits gives 20244402666.

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 23 ways as a sum of consecutive naturals, for example, 324816 + ... + 382091.

It is an arithmetic number, because the mean of its divisors is an integer number (960334518).

Almost surely, 2^20244402666 is an apocalyptic number.

20244402666 is an abundant number, since it is smaller than the sum of its proper divisors (25851654198).

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

20244402666 is a wasteful number, since it uses less digits than its factorization.

20244402666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 706995 (or 706992 counting only the distinct ones).

The product of its (nonzero) digits is 110592, while the sum is 36.

Adding to 20244402666 its reverse (66620444202), we get a palindrome (86864846868).

The spelling of 20244402666 in words is "twenty billion, two hundred forty-four million, four hundred two thousand, six hundred sixty-six".