18058538309 has 16 divisors (see below), whose sum is σ = 20975554176. Its totient is φ = 15227784000.

The previous prime is 18058538299. The next prime is 18058538317. The reversal of 18058538309 is 90383585081.

It is a cyclic number.

It is not a de Polignac number, because 18058538309 - 2²⁴ = 18041761093 is a prime.

It is a super-2 number, since 2×18058538309² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18058532309) 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, 29654 + ... + 192344.

It is an arithmetic number, because the mean of its divisors is an integer number (1310972136).

Almost surely, 2^18058538309 is an apocalyptic number.

It is an amenable number.

18058538309 is a deficient number, since it is larger than the sum of its proper divisors (2917015867).

18058538309 is a wasteful number, since it uses less digits than its factorization.

18058538309 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 162956.

The product of its (nonzero) digits is 1036800, while the sum is 50.

The spelling of 18058538309 in words is "eighteen billion, fifty-eight million, five hundred thirty-eight thousand, three hundred nine".