19983783802 has 4 divisors (see below), whose sum is σ = 29975675706. Its totient is φ = 9991891900.

The previous prime is 19983783761. The next prime is 19983783803. The reversal of 19983783802 is 20838738991.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 19287932161 + 695851641 = 138881^2 + 26379^2 .

It is a Smith number, since the sum of its digits (58) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (19983783803) by changing a digit.

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 as a sum of consecutive naturals, namely, 4995945949 + ... + 4995945952.

Almost surely, 2^19983783802 is an apocalyptic number.

19983783802 is a deficient number, since it is larger than the sum of its proper divisors (9991891904).

19983783802 is an equidigital number, since it uses as much as digits as its factorization.

19983783802 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9991891903.

The product of its (nonzero) digits is 5225472, while the sum is 58.

The spelling of 19983783802 in words is "nineteen billion, nine hundred eighty-three million, seven hundred eighty-three thousand, eight hundred two".