19840987332 has 18 divisors (see below), whose sum is σ = 50153606958. Its totient is φ = 6613662432.

The previous prime is 19840987277. The next prime is 19840987379. The reversal of 19840987332 is 23378904891.

19840987332 is a `hidden beast` number, since 198 + 40 + 9 + 87 + 332 = 666.

It can be written as a sum of positive squares in only one way, i.e., 14987635776 + 4853351556 = 122424^2 + 69666^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 275569233 + ... + 275569304.

Almost surely, 2^19840987332 is an apocalyptic number.

19840987332 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

19840987332 is an abundant number, since it is smaller than the sum of its proper divisors (30312619626).

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

19840987332 is a wasteful number, since it uses less digits than its factorization.

19840987332 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 551138547 (or 551138542 counting only the distinct ones).

The product of its (nonzero) digits is 2612736, while the sum is 54.

The spelling of 19840987332 in words is "nineteen billion, eight hundred forty million, nine hundred eighty-seven thousand, three hundred thirty-two".