21323334503 has 2 divisors, whose sum is σ = 21323334504. Its totient is φ = 21323334502.

The previous prime is 21323334499. The next prime is 21323334541. The reversal of 21323334503 is 30543332312.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21323334503 - 2² = 21323334499 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21323334103) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10661667251 + 10661667252.

It is an arithmetic number, because the mean of its divisors is an integer number (10661667252).

Almost surely, 2^21323334503 is an apocalyptic number.

21323334503 is a deficient number, since it is larger than the sum of its proper divisors (1).

21323334503 is an equidigital number, since it uses as much as digits as its factorization.

21323334503 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 19440, while the sum is 29.

Adding to 21323334503 its reverse (30543332312), we get a palindrome (51866666815).

The spelling of 21323334503 in words is "twenty-one billion, three hundred twenty-three million, three hundred thirty-four thousand, five hundred three".