18350170509 has 16 divisors (see below), whose sum is σ = 26748334080. Its totient is φ = 11097491760.

The previous prime is 18350170459. The next prime is 18350170513. The reversal of 18350170509 is 90507105381.

It is not a de Polignac number, because 18350170509 - 2¹⁹ = 18349646221 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18350170009) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 579949 + ... + 610770.

It is an arithmetic number, because the mean of its divisors is an integer number (1671770880).

Almost surely, 2^18350170509 is an apocalyptic number.

It is an amenable number.

18350170509 is a deficient number, since it is larger than the sum of its proper divisors (8398163571).

18350170509 is a wasteful number, since it uses less digits than its factorization.

18350170509 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1191200.

The product of its (nonzero) digits is 37800, while the sum is 39.

The spelling of 18350170509 in words is "eighteen billion, three hundred fifty million, one hundred seventy thousand, five hundred nine".