19899984276 has 36 divisors (see below), whose sum is σ = 51472573152. Its totient is φ = 6479064144.

The previous prime is 19899984263. The next prime is 19899984277. The reversal of 19899984276 is 67248999891.

19899984276 is a `hidden beast` number, since 198 + 9 + 9 + 9 + 8 + 427 + 6 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19899984277) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 6426096 + ... + 6429191.

Almost surely, 2^19899984276 is an apocalyptic number.

It is an amenable number.

19899984276 is an abundant number, since it is smaller than the sum of its proper divisors (31572588876).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

19899984276 is a wasteful number, since it uses less digits than its factorization.

19899984276 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12855340 (or 12855335 counting only the distinct ones).

The product of its digits is 141087744, while the sum is 72.

The spelling of 19899984276 in words is "nineteen billion, eight hundred ninety-nine million, nine hundred eighty-four thousand, two hundred seventy-six".