19824199820 has 12 divisors (see below), whose sum is σ = 41630819664. Its totient is φ = 7929679920.

The previous prime is 19824199819. The next prime is 19824199853. The reversal of 19824199820 is 2899142891.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 495604976 + ... + 495605015.

It is an arithmetic number, because the mean of its divisors is an integer number (3469234972).

Almost surely, 2^19824199820 is an apocalyptic number.

19824199820 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

19824199820 is an abundant number, since it is smaller than the sum of its proper divisors (21806619844).

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

19824199820 is a wasteful number, since it uses less digits than its factorization.

19824199820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 991210000 (or 991209998 counting only the distinct ones).

The product of its (nonzero) digits is 746496, while the sum is 53.

The spelling of 19824199820 in words is "nineteen billion, eight hundred twenty-four million, one hundred ninety-nine thousand, eight hundred twenty".