19939803 has 24 divisors (see below), whose sum is σ = 29268288. Its totient is φ = 12066912.

The previous prime is 19939783. The next prime is 19939811. The reversal of 19939803 is 30893991.

It is a happy number.

It is not a de Polignac number, because 19939803 - 2⁶ = 19939739 is a prime.

It is not an unprimeable number, because it can be changed into a prime (19939883) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 33676 + ... + 34262.

It is an arithmetic number, because the mean of its divisors is an integer number (1219512).

Almost surely, 2^19939803 is an apocalyptic number.

19939803 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

19939803 is a deficient number, since it is larger than the sum of its proper divisors (9328485).

19939803 is a wasteful number, since it uses less digits than its factorization.

19939803 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 683 (or 670 counting only the distinct ones).

The product of its (nonzero) digits is 52488, while the sum is 42.

The square root of 19939803 is about 4465.4006539167. The cubic root of 19939803 is about 271.1691549791.

The spelling of 19939803 in words is "nineteen million, nine hundred thirty-nine thousand, eight hundred three".