19964759999 has 16 divisors (see below), whose sum is σ = 21700091520. Its totient is φ = 18298275840.

The previous prime is 19964759977. The next prime is 19964760037. The reversal of 19964759999 is 99995746991.

It is a cyclic number.

It is not a de Polignac number, because 19964759999 - 2¹² = 19964755903 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19964759929) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3782 + ... + 199859.

It is an arithmetic number, because the mean of its divisors is an integer number (1356255720).

Almost surely, 2^19964759999 is an apocalyptic number.

19964759999 is a deficient number, since it is larger than the sum of its proper divisors (1735331521).

19964759999 is a wasteful number, since it uses less digits than its factorization.

19964759999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 203810.

The product of its digits is 446410440, while the sum is 77.

The spelling of 19964759999 in words is "nineteen billion, nine hundred sixty-four million, seven hundred fifty-nine thousand, nine hundred ninety-nine".