21322318903 has 2 divisors, whose sum is σ = 21322318904. Its totient is φ = 21322318902.

The previous prime is 21322318891. The next prime is 21322318907. The reversal of 21322318903 is 30981322312.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21322318903 is a prime.

It is a super-2 number, since 2×21322318903² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21322318907) 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, 10661159451 + 10661159452.

It is an arithmetic number, because the mean of its divisors is an integer number (10661159452).

Almost surely, 2^21322318903 is an apocalyptic number.

21322318903 is a deficient number, since it is larger than the sum of its proper divisors (1).

21322318903 is an equidigital number, since it uses as much as digits as its factorization.

21322318903 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 15552, while the sum is 34.

The spelling of 21322318903 in words is "twenty-one billion, three hundred twenty-two million, three hundred eighteen thousand, nine hundred three".