20200003 has 16 divisors (see below), whose sum is σ = 22321152.
Its totient is φ = 18216000.
The previous prime is 20199973. The next prime is 20200013. The reversal of 20200003 is 30000202.
It is a de Polignac number, because none of the positive numbers 2k-20200003 is a prime.
It is a Duffinian number.
It is not an unprimeable number, because it can be changed into a prime (20200013) by changing a digit.
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, 28888 + ... + 29578.
It is an arithmetic number, because the mean of its divisors is an integer number (1395072).
Almost surely, 220200003 is an apocalyptic number.
20200003 is a gapful number since it is divisible by the number (23) formed by its first and last digit.
20200003 is a deficient number, since it is larger than the sum of its proper divisors (2121149).
20200003 is a wasteful number, since it uses less digits than its factorization.
20200003 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 786.
The product of its (nonzero) digits is 12, while the sum is 7.
The square root of 20200003 is about 4494.4413445945.
The cubic root of 20200003 is about 272.3435816392.
Adding to 20200003 its reverse (30000202), we get a palindrome (50200205).
The spelling of 20200003 in words is "twenty million, two hundred thousand, three".