17220504957 has 4 divisors (see below), whose sum is σ = 22960673280. Its totient is φ = 11480336636.

The previous prime is 17220504941. The next prime is 17220504967. The reversal of 17220504957 is 75940502271.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 75940502271 = 3 ⋅25313500757.

It is a cyclic number.

It is not a de Polignac number, because 17220504957 - 2⁴ = 17220504941 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (17220504967) 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, 2870084157 + ... + 2870084162.

It is an arithmetic number, because the mean of its divisors is an integer number (5740168320).

Almost surely, 2^17220504957 is an apocalyptic number.

It is an amenable number.

17220504957 is a deficient number, since it is larger than the sum of its proper divisors (5740168323).

17220504957 is an equidigital number, since it uses as much as digits as its factorization.

17220504957 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5740168322.

The product of its (nonzero) digits is 176400, while the sum is 42.

The spelling of 17220504957 in words is "seventeen billion, two hundred twenty million, five hundred four thousand, nine hundred fifty-seven".