21002434003 has 2 divisors, whose sum is σ = 21002434004. Its totient is φ = 21002434002.

The previous prime is 21002433943. The next prime is 21002434021. The reversal of 21002434003 is 30043420012.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21002434003 - 2¹³ = 21002425811 is a prime.

It is a super-2 number, since 2×21002434003² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (21002434043) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10501217001 + 10501217002.

It is an arithmetic number, because the mean of its divisors is an integer number (10501217002).

Almost surely, 2^21002434003 is an apocalyptic number.

21002434003 is a deficient number, since it is larger than the sum of its proper divisors (1).

21002434003 is an equidigital number, since it uses as much as digits as its factorization.

21002434003 is an evil number, because the sum of its binary digits is even.

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

Adding to 21002434003 its reverse (30043420012), we get a palindrome (51045854015).

The spelling of 21002434003 in words is "twenty-one billion, two million, four hundred thirty-four thousand, three".