17742218057 has 4 divisors (see below), whose sum is σ = 17763365760. Its totient is φ = 17721070356.

The previous prime is 17742218051. The next prime is 17742218129. The reversal of 17742218057 is 75081224771.

It is a happy number.

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 a cyclic number.

It is not a de Polignac number, because 17742218057 - 2³⁰ = 16668476233 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 17742217999 and 17742218017.

It is not an unprimeable number, because it can be changed into a prime (17742218051) 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, 10572593 + ... + 10574270.

It is an arithmetic number, because the mean of its divisors is an integer number (4440841440).

Almost surely, 2^17742218057 is an apocalyptic number.

It is an amenable number.

17742218057 is a deficient number, since it is larger than the sum of its proper divisors (21147703).

17742218057 is an equidigital number, since it uses as much as digits as its factorization.

17742218057 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21147702.

The product of its (nonzero) digits is 219520, while the sum is 44.

The spelling of 17742218057 in words is "seventeen billion, seven hundred forty-two million, two hundred eighteen thousand, fifty-seven".