21103232003 has 32 divisors (see below), whose sum is σ = 24807316992. Its totient is φ = 17579980800.

The previous prime is 21103231967. The next prime is 21103232009. The reversal of 21103232003 is 30023230112.

It is a cyclic number.

It is not a de Polignac number, because 21103232003 - 2²⁴ = 21086454787 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21103232009) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 13432208 + ... + 13433778.

It is an arithmetic number, because the mean of its divisors is an integer number (775228656).

Almost surely, 2^21103232003 is an apocalyptic number.

21103232003 is a deficient number, since it is larger than the sum of its proper divisors (3704084989).

21103232003 is a wasteful number, since it uses less digits than its factorization.

21103232003 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1995.

The product of its (nonzero) digits is 216, while the sum is 17.

Adding to 21103232003 its reverse (30023230112), we get a palindrome (51126462115).

The spelling of 21103232003 in words is "twenty-one billion, one hundred three million, two hundred thirty-two thousand, three".