20000003 has 2 divisors, whose sum is σ = 20000004.
Its totient is φ = 20000002.
The previous prime is 19999999. The next prime is 20000023. The reversal of 20000003 is 30000002.
Adding to 20000003 its reverse (30000002), we get a palindrome (50000005).
Subtracting 20000003 from its reverse (30000002), we obtain a palindrome (9999999).
It is a happy number.
It is a weak prime.
It is a cyclic number.
It is not a de Polignac number, because 20000003 - 22 = 19999999 is a prime.
20000003 is a modest number, since divided by 3 gives 2 as remainder.
It is not a weakly prime, because it can be changed into another prime (20000023) by changing a digit.
It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10000001 + 10000002.
It is an arithmetic number, because the mean of its divisors is an integer number (10000002).
Almost surely, 220000003 is an apocalyptic number.
20000003 is a deficient number, since it is larger than the sum of its proper divisors (1).
20000003 is an equidigital number, since it uses as much as digits as its factorization.
20000003 is an evil number, because the sum of its binary digits is even.
The product of its (nonzero) digits is 6, while the sum is 5.
The square root of 20000003 is about 4472.1362904098.
The cubic root of 20000003 is about 271.4417752316.
The spelling of 20000003 in words is "twenty million, three", and thus it is an aban number and an uban number.