20665210444 has 24 divisors (see below), whose sum is σ = 36607225536. Its totient is φ = 10206480000.

The previous prime is 20665210441. The next prime is 20665210469. The reversal of 20665210444 is 44401256602.

It is not an unprimeable number, because it can be changed into a prime (20665210441) 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 7 ways as a sum of consecutive naturals, for example, 114784 + ... + 233464.

It is an arithmetic number, because the mean of its divisors is an integer number (1525301064).

Almost surely, 2^20665210444 is an apocalyptic number.

It is an amenable number.

20665210444 is a deficient number, since it is larger than the sum of its proper divisors (15942015092).

20665210444 is a wasteful number, since it uses less digits than its factorization.

20665210444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 119217 (or 119215 counting only the distinct ones).

The product of its (nonzero) digits is 46080, while the sum is 34.

The spelling of 20665210444 in words is "twenty billion, six hundred sixty-five million, two hundred ten thousand, four hundred forty-four".