17745421007 has 4 divisors (see below), whose sum is σ = 17988509040. Its totient is φ = 17502332976.

The previous prime is 17745420977. The next prime is 17745421009. The reversal of 17745421007 is 70012454771.

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

It is a cyclic number.

It is not a de Polignac number, because 17745421007 - 2⁸ = 17745420751 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 (17745421009) 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 in 3 ways as a sum of consecutive naturals, for example, 121543907 + ... + 121544052.

It is an arithmetic number, because the mean of its divisors is an integer number (4497127260).

Almost surely, 2^17745421007 is an apocalyptic number.

17745421007 is a deficient number, since it is larger than the sum of its proper divisors (243088033).

17745421007 is an equidigital number, since it uses as much as digits as its factorization.

17745421007 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 243088032.

The product of its (nonzero) digits is 54880, while the sum is 38.

Adding to 17745421007 its reverse (70012454771), we get a palindrome (87757875778).

The spelling of 17745421007 in words is "seventeen billion, seven hundred forty-five million, four hundred twenty-one thousand, seven".