20003203105 has 16 divisors (see below), whose sum is σ = 24365937024. Its totient is φ = 15761612160.

The previous prime is 20003203057. The next prime is 20003203139. The reversal of 20003203105 is 50130230002.

It is not a de Polignac number, because 20003203105 - 2⁷ = 20003202977 is a prime.

It is a Duffinian number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 339442 + ... + 393988.

It is an arithmetic number, because the mean of its divisors is an integer number (1522871064).

Almost surely, 2^20003203105 is an apocalyptic number.

It is an amenable number.

20003203105 is a deficient number, since it is larger than the sum of its proper divisors (4362733919).

20003203105 is a wasteful number, since it uses less digits than its factorization.

20003203105 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55656.

The product of its (nonzero) digits is 180, while the sum is 16.

Adding to 20003203105 its reverse (50130230002), we get a palindrome (70133433107).

The spelling of 20003203105 in words is "twenty billion, three million, two hundred three thousand, one hundred five".