17420628447 has 24 divisors (see below), whose sum is σ = 26101669776. Its totient is φ = 11610827712.

The previous prime is 17420628437. The next prime is 17420628479. The reversal of 17420628447 is 74482602471.

17420628447 is a `hidden beast` number, since 17 + 4 + 2 + 0 + 628 + 4 + 4 + 7 = 666.

It is not a de Polignac number, because 17420628447 - 2⁴ = 17420628431 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (17420628437) 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 23 ways as a sum of consecutive naturals, for example, 1426893 + ... + 1439049.

It is an arithmetic number, because the mean of its divisors is an integer number (1087569574).

Almost surely, 2^17420628447 is an apocalyptic number.

17420628447 is a deficient number, since it is larger than the sum of its proper divisors (8681041329).

17420628447 is an equidigital number, since it uses as much as digits as its factorization.

17420628447 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18069 (or 18057 counting only the distinct ones).

The product of its (nonzero) digits is 602112, while the sum is 45.

The spelling of 17420628447 in words is "seventeen billion, four hundred twenty million, six hundred twenty-eight thousand, four hundred forty-seven".