17994097709 has 8 divisors (see below), whose sum is σ = 20570509248. Its totient is φ = 15419142720.

The previous prime is 17994097703. The next prime is 17994097717. The reversal of 17994097709 is 90779049971.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 17994097709 - 2⁸ = 17994097453 is a prime.

It is a super-2 number, since 2×17994097709² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (17994097703) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 337532 + ... + 387189.

It is an arithmetic number, because the mean of its divisors is an integer number (2571313656).

Almost surely, 2^17994097709 is an apocalyptic number.

It is an amenable number.

17994097709 is a deficient number, since it is larger than the sum of its proper divisors (2576411539).

17994097709 is an equidigital number, since it uses as much as digits as its factorization.

17994097709 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 728275.

The product of its (nonzero) digits is 9001692, while the sum is 62.

The spelling of 17994097709 in words is "seventeen billion, nine hundred ninety-four million, ninety-seven thousand, seven hundred nine".