19965441764 has 24 divisors (see below), whose sum is σ = 35528309376. Its totient is φ = 9814644000.

The previous prime is 19965441763. The next prime is 19965441803. The reversal of 19965441764 is 46714456991.

It is not an unprimeable number, because it can be changed into a prime (19965441763) 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, 561269 + ... + 595779.

It is an arithmetic number, because the mean of its divisors is an integer number (1480346224).

Almost surely, 2^19965441764 is an apocalyptic number.

It is an amenable number.

19965441764 is a deficient number, since it is larger than the sum of its proper divisors (15562867612).

19965441764 is a wasteful number, since it uses less digits than its factorization.

19965441764 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36947 (or 36945 counting only the distinct ones).

The product of its digits is 6531840, while the sum is 56.

The spelling of 19965441764 in words is "nineteen billion, nine hundred sixty-five million, four hundred forty-one thousand, seven hundred sixty-four".