21302442430503 has 32 divisors (see below), whose sum is σ = 30631778451456. Its totient is φ = 13090498725888.

The previous prime is 21302442430499. The next prime is 21302442430531. The reversal of 21302442430503 is 30503424420312.

It is not a de Polignac number, because 21302442430503 - 2² = 21302442430499 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21302442430103) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 78796026 + ... + 79065912.

It is an arithmetic number, because the mean of its divisors is an integer number (957243076608).

Almost surely, 2^{21302442430503} is an apocalyptic number.

21302442430503 is a deficient number, since it is larger than the sum of its proper divisors (9329336020953).

21302442430503 is a wasteful number, since it uses less digits than its factorization.

21302442430503 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 272783.

The product of its (nonzero) digits is 69120, while the sum is 33.

Adding to 21302442430503 its reverse (30503424420312), we get a palindrome (51805866850815).

The spelling of 21302442430503 in words is "twenty-one trillion, three hundred two billion, four hundred forty-two million, four hundred thirty thousand, five hundred three".