21033510003 has 80 divisors (see below), whose sum is σ = 34725335040. Its totient is φ = 12581956800.

The previous prime is 21033509993. The next prime is 21033510019. The reversal of 21033510003 is 30001533012.

It is not a de Polignac number, because 21033510003 - 2⁸ = 21033509747 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21033510023) 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 79 ways as a sum of consecutive naturals, for example, 30438888 + ... + 30439578.

It is an arithmetic number, because the mean of its divisors is an integer number (434066688).

Almost surely, 2^21033510003 is an apocalyptic number.

21033510003 is a deficient number, since it is larger than the sum of its proper divisors (13691825037).

21033510003 is a wasteful number, since it uses less digits than its factorization.

21033510003 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1110 (or 1101 counting only the distinct ones).

The product of its (nonzero) digits is 270, while the sum is 18.

The spelling of 21033510003 in words is "twenty-one billion, thirty-three million, five hundred ten thousand, three".