18058728194 has 16 divisors (see below), whose sum is σ = 29187217080. Its totient is φ = 8330390400.

The previous prime is 18058728161. The next prime is 18058728203. The reversal of 18058728194 is 49182785081.

It can be written as a sum of positive squares in 4 ways, for example, as 8512461169 + 9546267025 = 92263^2 + 97705^2 .

It is a super-3 number, since 3×18058728194³ (a number of 32 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 133259 + ... + 232110.

Almost surely, 2^18058728194 is an apocalyptic number.

18058728194 is a deficient number, since it is larger than the sum of its proper divisors (11128488886).

18058728194 is a wasteful number, since it uses less digits than its factorization.

18058728194 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 367285.

The product of its (nonzero) digits is 1290240, while the sum is 53.

The spelling of 18058728194 in words is "eighteen billion, fifty-eight million, seven hundred twenty-eight thousand, one hundred ninety-four".