19899984290 has 8 divisors (see below), whose sum is σ = 35819971740. Its totient is φ = 7959993712.

The previous prime is 19899984289. The next prime is 19899984331. The reversal of 19899984290 is 9248999891.

It can be written as a sum of positive squares in 2 ways, for example, as 17433769369 + 2466214921 = 132037^2 + 49661^2 .

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

It is a self number, because there is not a number n which added to its sum of digits gives 19899984290.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 994999205 + ... + 994999224.

Almost surely, 2^19899984290 is an apocalyptic number.

19899984290 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

19899984290 is a deficient number, since it is larger than the sum of its proper divisors (15919987450).

19899984290 is a wasteful number, since it uses less digits than its factorization.

19899984290 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1989998436.

The product of its (nonzero) digits is 30233088, while the sum is 68.

The spelling of 19899984290 in words is "nineteen billion, eight hundred ninety-nine million, nine hundred eighty-four thousand, two hundred ninety".