17998227057 has 4 divisors (see below), whose sum is σ = 23997636080. Its totient is φ = 11998818036.

The previous prime is 17998227011. The next prime is 17998227067. The reversal of 17998227057 is 75072289971.

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.

It is not a de Polignac number, because 17998227057 - 2⁷ = 17998226929 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 17998226988 and 17998227006.

It is not an unprimeable number, because it can be changed into a prime (17998227067) 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, 2999704507 + ... + 2999704512.

It is an arithmetic number, because the mean of its divisors is an integer number (5999409020).

Almost surely, 2^17998227057 is an apocalyptic number.

It is an amenable number.

17998227057 is a deficient number, since it is larger than the sum of its proper divisors (5999409023).

17998227057 is an equidigital number, since it uses as much as digits as its factorization.

17998227057 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5999409022.

The product of its (nonzero) digits is 4445280, while the sum is 57.

The spelling of 17998227057 in words is "seventeen billion, nine hundred ninety-eight million, two hundred twenty-seven thousand, fifty-seven".