17420807805 has 16 divisors (see below), whose sum is σ = 28092770304. Its totient is φ = 9217938240.

The previous prime is 17420807753. The next prime is 17420807809. The reversal of 17420807805 is 50870802471.

It is not a de Polignac number, because 17420807805 - 2⁶ = 17420807741 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (17420807809) 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 15 ways as a sum of consecutive naturals, for example, 4570486 + ... + 4574295.

It is an arithmetic number, because the mean of its divisors is an integer number (1755798144).

Almost surely, 2^17420807805 is an apocalyptic number.

17420807805 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

17420807805 is a deficient number, since it is larger than the sum of its proper divisors (10671962499).

17420807805 is a wasteful number, since it uses less digits than its factorization.

17420807805 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9144916.

The product of its (nonzero) digits is 125440, while the sum is 42.

The spelling of 17420807805 in words is "seventeen billion, four hundred twenty million, eight hundred seven thousand, eight hundred five".