2100020003 has 2 divisors, whose sum is σ = 2100020004. Its totient is φ = 2100020002.

The previous prime is 2100019993. The next prime is 2100020029. The reversal of 2100020003 is 3000200012.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2100020003 is a prime.

It is not a weakly prime, because it can be changed into another prime (2100020033) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1050010001 + 1050010002.

It is an arithmetic number, because the mean of its divisors is an integer number (1050010002).

Almost surely, 2^2100020003 is an apocalyptic number.

2100020003 is a deficient number, since it is larger than the sum of its proper divisors (1).

2100020003 is an equidigital number, since it uses as much as digits as its factorization.

2100020003 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 12, while the sum is 8.

The square root of 2100020003 is about 45825.9751996616. The cubic root of 2100020003 is about 1280.5832309151.

Adding to 2100020003 its reverse (3000200012), we get a palindrome (5100220015).

Subtracting 2100020003 from its reverse (3000200012), we obtain a square (900180009 = 30003²).

The spelling of 2100020003 in words is "two billion, one hundred million, twenty thousand, three".