17434476421 has 4 divisors (see below), whose sum is σ = 17434874700. Its totient is φ = 17434078144.

The previous prime is 17434476379. The next prime is 17434476443. The reversal of 17434476421 is 12467443471.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 12993720100 + 4440756321 = 113990^2 + 66639^2 .

It is a cyclic number.

It is not a de Polignac number, because 17434476421 - 2⁹ = 17434475909 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (17434477421) 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 in 3 ways as a sum of consecutive naturals, for example, 124036 + ... + 224173.

It is an arithmetic number, because the mean of its divisors is an integer number (4358718675).

Almost surely, 2^17434476421 is an apocalyptic number.

It is an amenable number.

17434476421 is a deficient number, since it is larger than the sum of its proper divisors (398279).

17434476421 is an equidigital number, since it uses as much as digits as its factorization.

17434476421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 398278.

The product of its digits is 451584, while the sum is 43.

The spelling of 17434476421 in words is "seventeen billion, four hundred thirty-four million, four hundred seventy-six thousand, four hundred twenty-one".