19819823802 has 16 divisors (see below), whose sum is σ = 39641266560. Its totient is φ = 6606338112.

The previous prime is 19819823797. The next prime is 19819823819. The reversal of 19819823802 is 20832891891.

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 7 ways as a sum of consecutive naturals, for example, 141474 + ... + 244242.

It is an arithmetic number, because the mean of its divisors is an integer number (2477579160).

Almost surely, 2^19819823802 is an apocalyptic number.

19819823802 is an abundant number, since it is smaller than the sum of its proper divisors (19821442758).

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

19819823802 is a wasteful number, since it uses less digits than its factorization.

19819823802 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 134917.

The product of its (nonzero) digits is 497664, while the sum is 51.

The spelling of 19819823802 in words is "nineteen billion, eight hundred nineteen million, eight hundred twenty-three thousand, eight hundred two".