19999801835 has 32 divisors (see below), whose sum is σ = 26423917632. Its totient is φ = 14442024960.

The previous prime is 19999801813. The next prime is 19999801837. The reversal of 19999801835 is 53810899991.

It is not a de Polignac number, because 19999801835 - 2¹⁴ = 19999785451 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (19999801837) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 579875 + ... + 613395.

It is an arithmetic number, because the mean of its divisors is an integer number (825747426).

Almost surely, 2^19999801835 is an apocalyptic number.

19999801835 is a deficient number, since it is larger than the sum of its proper divisors (6424115797).

19999801835 is a wasteful number, since it uses less digits than its factorization.

19999801835 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33743.

The product of its (nonzero) digits is 6298560, while the sum is 62.

The spelling of 19999801835 in words is "nineteen billion, nine hundred ninety-nine million, eight hundred one thousand, eight hundred thirty-five".