18058885 has 8 divisors (see below), whose sum is σ = 23337720. Its totient is φ = 13335744.

The previous prime is 18058883. The next prime is 18058903. The reversal of 18058885 is 58885081.

It can be written as a sum of positive squares in 4 ways, for example, as 4153444 + 13905441 = 2038^2 + 3729^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 18058885 - 2¹ = 18058883 is a prime.

It is a super-2 number, since 2×18058885² = 652246654886450, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18058883) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 138850 + ... + 138979.

It is an arithmetic number, because the mean of its divisors is an integer number (2917215).

Almost surely, 2^18058885 is an apocalyptic number.

It is an amenable number.

18058885 is a deficient number, since it is larger than the sum of its proper divisors (5278835).

18058885 is a wasteful number, since it uses less digits than its factorization.

18058885 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 277847.

The product of its (nonzero) digits is 102400, while the sum is 43.

The square root of 18058885 is about 4249.5746846008. The cubic root of 18058885 is about 262.3596104938.

The spelling of 18058885 in words is "eighteen million, fifty-eight thousand, eight hundred eighty-five".