17420797553 has 4 divisors (see below), whose sum is σ = 18021514740. Its totient is φ = 16820080368.

The previous prime is 17420797543. The next prime is 17420797613. The reversal of 17420797553 is 35579702471.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 35579702471 = 61 ⋅583273811.

It can be written as a sum of positive squares in 2 ways, for example, as 8291377249 + 9129420304 = 91057^2 + 95548^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-17420797553 is a prime.

It is a super-2 number, since 2×17420797553² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (17420797543) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 300358550 + ... + 300358607.

It is an arithmetic number, because the mean of its divisors is an integer number (4505378685).

Almost surely, 2^17420797553 is an apocalyptic number.

It is an amenable number.

17420797553 is a deficient number, since it is larger than the sum of its proper divisors (600717187).

17420797553 is an equidigital number, since it uses as much as digits as its factorization.

17420797553 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 600717186.

The product of its (nonzero) digits is 1852200, while the sum is 50.

The spelling of 17420797553 in words is "seventeen billion, four hundred twenty million, seven hundred ninety-seven thousand, five hundred fifty-three".