21022424459 has 2 divisors, whose sum is σ = 21022424460. Its totient is φ = 21022424458.

The previous prime is 21022424387. The next prime is 21022424483. The reversal of 21022424459 is 95442422012.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21022424459 - 2³² = 16727457163 is a prime.

It is a super-2 number, since 2×21022424459² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (21022424659) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10511212229 + 10511212230.

It is an arithmetic number, because the mean of its divisors is an integer number (10511212230).

Almost surely, 2^21022424459 is an apocalyptic number.

21022424459 is a deficient number, since it is larger than the sum of its proper divisors (1).

21022424459 is an equidigital number, since it uses as much as digits as its factorization.

21022424459 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 46080, while the sum is 35.

The spelling of 21022424459 in words is "twenty-one billion, twenty-two million, four hundred twenty-four thousand, four hundred fifty-nine".