19828304840 has 32 divisors (see below), whose sum is σ = 44621211960. Its totient is φ = 7929984000.

The previous prime is 19828304803. The next prime is 19828304891. The reversal of 19828304840 is 4840382891.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 8194956676 + 11633348164 = 90526^2 + 107858^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 218240 + ... + 295440.

Almost surely, 2^19828304840 is an apocalyptic number.

19828304840 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

19828304840 is an abundant number, since it is smaller than the sum of its proper divisors (24792907120).

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

19828304840 is a wasteful number, since it uses less digits than its factorization.

19828304840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 83633 (or 83629 counting only the distinct ones).

The product of its (nonzero) digits is 442368, while the sum is 47.

The spelling of 19828304840 in words is "nineteen billion, eight hundred twenty-eight million, three hundred four thousand, eight hundred forty".