21004234003 has 2 divisors, whose sum is σ = 21004234004. Its totient is φ = 21004234002.

The previous prime is 21004233997. The next prime is 21004234033. The reversal of 21004234003 is 30043240012.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21004234003 - 2²¹ = 21002136851 is a prime.

It is not a weakly prime, because it can be changed into another prime (21004234033) 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 as a sum of consecutive naturals, namely, 10502117001 + 10502117002.

It is an arithmetic number, because the mean of its divisors is an integer number (10502117002).

Almost surely, 2^21004234003 is an apocalyptic number.

21004234003 is a deficient number, since it is larger than the sum of its proper divisors (1).

21004234003 is an equidigital number, since it uses as much as digits as its factorization.

21004234003 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 576, while the sum is 19.

Adding to 21004234003 its reverse (30043240012), we get a palindrome (51047474015).

The spelling of 21004234003 in words is "twenty-one billion, four million, two hundred thirty-four thousand, three".