21332342503 has 2 divisors, whose sum is σ = 21332342504. Its totient is φ = 21332342502.

The previous prime is 21332342443. The next prime is 21332342531. The reversal of 21332342503 is 30524323312.

It is an a-pointer prime, because the next prime (21332342531) can be obtained adding 21332342503 to its sum of digits (28).

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21332342503 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21332342533) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10666171251 + 10666171252.

It is an arithmetic number, because the mean of its divisors is an integer number (10666171252).

Almost surely, 2^21332342503 is an apocalyptic number.

21332342503 is a deficient number, since it is larger than the sum of its proper divisors (1).

21332342503 is an equidigital number, since it uses as much as digits as its factorization.

21332342503 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 12960, while the sum is 28.

Adding to 21332342503 its reverse (30524323312), we get a palindrome (51856665815).

The spelling of 21332342503 in words is "twenty-one billion, three hundred thirty-two million, three hundred forty-two thousand, five hundred three".