1000020003 has 4 divisors (see below), whose sum is σ = 1333360008. Its totient is φ = 666680000.

The previous prime is 1000020001. The next prime is 1000020011. The reversal of 1000020003 is 3000200001.

1000020003 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1000020003 - 2¹ = 1000020001 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1000019973 and 1000020000.

It is not an unprimeable number, because it can be changed into a prime (1000020001) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 166669998 + ... + 166670003.

It is an arithmetic number, because the mean of its divisors is an integer number (333340002).

Almost surely, 2^1000020003 is an apocalyptic number.

1000020003 is a deficient number, since it is larger than the sum of its proper divisors (333340005).

1000020003 is an equidigital number, since it uses as much as digits as its factorization.

1000020003 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 333340004.

The product of its (nonzero) digits is 6, while the sum is 6.

The square root of 1000020003 is about 31623.0928753024. The cubic root of 1000020003 is about 1000.0066676222.

Adding to 1000020003 its reverse (3000200001), we get a palindrome (4000220004).

It can be divided in two parts, 10000 and 20003, that added together give a palindrome (30003).

The spelling of 1000020003 in words is "one billion, twenty thousand, three".