17420247495049 has 9 divisors (see below), whose sum is σ = 20264403521421. Its totient is φ = 14931615667500.

The previous prime is 17420247495019. The next prime is 17420247495059. The reversal of 17420247495049 is 94059474202471.

The square root of 17420247495049 is 4173757.

It is a perfect power (a square), and thus also a powerful number.

It is not a de Polignac number, because 17420247495049 - 2¹⁷ = 17420247363977 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 17420247494984 and 17420247495002.

It is not an unprimeable number, because it can be changed into a prime (17420247495019) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 28918174 + ... + 29514424.

It is an arithmetic number, because the mean of its divisors is an integer number (2251600391269).

Almost surely, 2^{17420247495049} is an apocalyptic number.

17420247495049 is the 4173757-th square number.

17420247495049 is the 2086879-th centered octagonal number.

It is an amenable number.

17420247495049 is a deficient number, since it is larger than the sum of its proper divisors (2844156026372).

17420247495049 is an frugal number, since it uses more digits than its factorization.

17420247495049 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1192516 (or 596258 counting only the distinct ones).

The product of its (nonzero) digits is 20321280, while the sum is 58.

The spelling of 17420247495049 in words is "seventeen trillion, four hundred twenty billion, two hundred forty-seven million, four hundred ninety-five thousand, forty-nine".