2100030003 has 8 divisors (see below), whose sum is σ = 3111155600. Its totient is φ = 1400019984.

The previous prime is 2100029999. The next prime is 2100030017. The reversal of 2100030003 is 3000300012.

It is a happy number.

It is not a de Polignac number, because 2100030003 - 2² = 2100029999 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a Duffinian number.

2100030003 is a modest number, since divided by 30003 gives 21 as remainder.

It is not an unprimeable number, because it can be changed into a prime (2100030703) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 38889418 + ... + 38889471.

It is an arithmetic number, because the mean of its divisors is an integer number (388894450).

Almost surely, 2^2100030003 is an apocalyptic number.

2100030003 is a deficient number, since it is larger than the sum of its proper divisors (1011125597).

2100030003 is an equidigital number, since it uses as much as digits as its factorization.

2100030003 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77778898 (or 77778892 counting only the distinct ones).

The product of its (nonzero) digits is 18, while the sum is 9.

The square root of 2100030003 is about 45826.0843079572. The cubic root of 2100030003 is about 1280.5852635643.

Adding to 2100030003 its reverse (3000300012), we get a palindrome (5100330015).

The spelling of 2100030003 in words is "two billion, one hundred million, thirty thousand, three".