19536985803 has 54 divisors (see below), whose sum is σ = 28555753588. Its totient is φ = 11878892800.

The previous prime is 19536985789. The next prime is 19536985823. The reversal of 19536985803 is 30858963591.

It is not a de Polignac number, because 19536985803 - 2⁶ = 19536985739 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (19536985823) by changing a digit.

It is a polite number, since it can be written in 53 ways as a sum of consecutive naturals, for example, 193435453 + ... + 193435553.

Almost surely, 2^19536985803 is an apocalyptic number.

19536985803 is a deficient number, since it is larger than the sum of its proper divisors (9018767785).

19536985803 is an equidigital number, since it uses as much as digits as its factorization.

19536985803 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 333 (or 168 counting only the distinct ones).

The product of its (nonzero) digits is 6998400, while the sum is 57.

The spelling of 19536985803 in words is "nineteen billion, five hundred thirty-six million, nine hundred eighty-five thousand, eight hundred three".