20003120203 has 6 divisors (see below), whose sum is σ = 21986900852. Its totient is φ = 18184654620.

The previous prime is 20003120201. The next prime is 20003120231. The reversal of 20003120203 is 30202130002.

It is a happy number.

It is not a de Polignac number, because 20003120203 - 2¹ = 20003120201 is a prime.

It is a super-2 number, since 2×20003120203² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20003120201) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 82657401 + ... + 82657642.

Almost surely, 2^20003120203 is an apocalyptic number.

20003120203 is a deficient number, since it is larger than the sum of its proper divisors (1983780649).

20003120203 is a wasteful number, since it uses less digits than its factorization.

20003120203 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 165315065 (or 165315054 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 13.

Adding to 20003120203 its reverse (30202130002), we get a palindrome (50205250205).

The spelling of 20003120203 in words is "twenty billion, three million, one hundred twenty thousand, two hundred three".