20444455766 has 16 divisors (see below), whose sum is σ = 35049536160. Its totient is φ = 8761435200.

The previous prime is 20444455729. The next prime is 20444455769. The reversal of 20444455766 is 66755444402.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 20444455766.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20444455769) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 386780 + ... + 436448.

It is an arithmetic number, because the mean of its divisors is an integer number (2190596010).

Almost surely, 2^20444455766 is an apocalyptic number.

20444455766 is a deficient number, since it is larger than the sum of its proper divisors (14605080394).

20444455766 is a wasteful number, since it uses less digits than its factorization.

20444455766 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79079.

The product of its (nonzero) digits is 3225600, while the sum is 47.

The spelling of 20444455766 in words is "twenty billion, four hundred forty-four million, four hundred fifty-five thousand, seven hundred sixty-six".