19999999963 has 8 divisors (see below), whose sum is σ = 21054017600. Its totient is φ = 18946120968.

The previous prime is 19999999939. The next prime is 19999999967. The reversal of 19999999963 is 36999999991.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 19999999963 - 2⁹ = 19999999451 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (19999999967) 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, 403768 + ... + 450586.

It is an arithmetic number, because the mean of its divisors is an integer number (2631752200).

Almost surely, 2^19999999963 is an apocalyptic number.

19999999963 is a deficient number, since it is larger than the sum of its proper divisors (1054017637).

19999999963 is a wasteful number, since it uses less digits than its factorization.

19999999963 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69321.

The product of its digits is 774840978, while the sum is 82.

The spelling of 19999999963 in words is "nineteen billion, nine hundred ninety-nine million, nine hundred ninety-nine thousand, nine hundred sixty-three".