19781244802 has 32 divisors (see below), whose sum is σ = 33252850944. Its totient is φ = 8821761520.

The previous prime is 19781244799. The next prime is 19781244811. The reversal of 19781244802 is 20844218791.

19781244802 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

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 15 ways as a sum of consecutive naturals, for example, 70983 + ... + 211189.

It is an arithmetic number, because the mean of its divisors is an integer number (1039151592).

Almost surely, 2^19781244802 is an apocalyptic number.

19781244802 is a deficient number, since it is larger than the sum of its proper divisors (13471606142).

19781244802 is a wasteful number, since it uses less digits than its factorization.

19781244802 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 140295 (or 140273 counting only the distinct ones).

The product of its (nonzero) digits is 258048, while the sum is 46.

The spelling of 19781244802 in words is "nineteen billion, seven hundred eighty-one million, two hundred forty-four thousand, eight hundred two".