17434930021 has 4 divisors (see below), whose sum is σ = 17491721632. Its totient is φ = 17378138412.

The previous prime is 17434930003. The next prime is 17434930033. The reversal of 17434930021 is 12003943471.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 17434930021 - 2¹⁷ = 17434798949 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 (17434930421) 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, 28395345 + ... + 28395958.

It is an arithmetic number, because the mean of its divisors is an integer number (4372930408).

Almost surely, 2^17434930021 is an apocalyptic number.

It is an amenable number.

17434930021 is a deficient number, since it is larger than the sum of its proper divisors (56791611).

17434930021 is an equidigital number, since it uses as much as digits as its factorization.

17434930021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56791610.

The product of its (nonzero) digits is 18144, while the sum is 34.

The spelling of 17434930021 in words is "seventeen billion, four hundred thirty-four million, nine hundred thirty thousand, twenty-one".