19899984331 has 2 divisors, whose sum is σ = 19899984332. Its totient is φ = 19899984330.

The previous prime is 19899984289. The next prime is 19899984347. The reversal of 19899984331 is 13348999891.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 19899984331 - 2¹⁵ = 19899951563 is a prime.

It is a super-2 number, since 2×19899984331² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (19899984631) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9949992165 + 9949992166.

It is an arithmetic number, because the mean of its divisors is an integer number (9949992166).

Almost surely, 2^19899984331 is an apocalyptic number.

19899984331 is a deficient number, since it is larger than the sum of its proper divisors (1).

19899984331 is an equidigital number, since it uses as much as digits as its factorization.

19899984331 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 15116544, while the sum is 64.

The spelling of 19899984331 in words is "nineteen billion, eight hundred ninety-nine million, nine hundred eighty-four thousand, three hundred thirty-one".