9999993999903 has 16 divisors (see below), whose sum is σ = 13892326089600. Its totient is φ = 6390469985760.

The previous prime is 9999993999857. The next prime is 9999993999913. The reversal of 9999993999903 is 3099993999999.

It is not a de Polignac number, because 9999993999903 - 2²⁰ = 9999992951327 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9999993999913) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 413449993 + ... + 413474178.

It is an arithmetic number, because the mean of its divisors is an integer number (868270380600).

Almost surely, 2^{9999993999903} is an apocalyptic number.

9999993999903 is a deficient number, since it is larger than the sum of its proper divisors (3892332089697).

9999993999903 is a wasteful number, since it uses less digits than its factorization.

9999993999903 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 826924342.

The product of its (nonzero) digits is 31381059609, while the sum is 96.

Adding to 9999993999903 its sum of digits (96), we get a palindrome (9999993999999).

The spelling of 9999993999903 in words is "nine trillion, nine hundred ninety-nine billion, nine hundred ninety-three million, nine hundred ninety-nine thousand, nine hundred three".