21424034659 has 2 divisors, whose sum is σ = 21424034660. Its totient is φ = 21424034658.

The previous prime is 21424034633. The next prime is 21424034677. The reversal of 21424034659 is 95643042412.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21424034659 - 2⁷ = 21424034531 is a prime.

It is a super-2 number, since 2×21424034659² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (21424034759) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10712017329 + 10712017330.

It is an arithmetic number, because the mean of its divisors is an integer number (10712017330).

Almost surely, 2^21424034659 is an apocalyptic number.

21424034659 is a deficient number, since it is larger than the sum of its proper divisors (1).

21424034659 is an equidigital number, since it uses as much as digits as its factorization.

21424034659 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 207360, while the sum is 40.

The spelling of 21424034659 in words is "twenty-one billion, four hundred twenty-four million, thirty-four thousand, six hundred fifty-nine".